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Recent questions and answers in Statistics and Probability
Questions
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Olympiad-Math
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Class 9
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Statistics and Probability
Three boys P,Q and R are to speak at a function along with 5 others. If all of them speak in random order, what is the probability that P speaks before Q and Q speaks before R?
olympiad
class9
math
statistics
probability
answered
Jun 10
by
rakeshkumarjaiswal1
1
answer
If the ratio of mode and median of a certain data is 6:5 then find the ratio of its mean and median
olympiad
class9
math
statistics
probability
answered
Feb 2
by
rupamyogya
2
answers
The 75th percentile is referred to as the
olympiad
class9
math
statistics
probability
answered
Dec 18, 2019
by
visharathraplover
1
answer
The mean of 8 observations was found to be 20 . Later it was detected that on eof the observations was found to be misread as 62. What is the correcr observation if the correct mean is 15.5 ?
olympiad
class9
math
statistics
probability
answered
Jul 26, 2019
by
monga.nalini1110
1
answer
The median of a sample will always equal the
olympiad
class9
math
statistics
probability
answered
Jul 12, 2019
by
atif685iqbal
2
answers
5 coins are tossed together. What is the probability of getting exactly 2 heads?
olympiad
class9
math
statistics
probability
answered
Mar 31, 2019
by
kingsurajsuman
1
answer
A bag contains 4 blue, 5 white and 6 green balls. Two balls are drawn at random. What is the probability that one ball is white?
olympiad
class9
math
statistics
probability
answered
Mar 27, 2019
by
jaircaribeh
1
answer
Mode of certain scores is x , If each score is decreased by 3 then mode of the new series is
olympiad
class9
math
statistics
probability
answered
Mar 4, 2019
by
muhamedamer3131
1
answer
Since the population size is always larger than the sample size, then the sample statistic
olympiad
class9
math
statistics
probability
answered
Mar 4, 2019
by
muhamedamer3131
1
answer
If the ratio of mean and median of a certain data is 2:3 then find the ratio of its mean and median
olympiad
class9
math
statistics
probability
answered
Jan 29, 2019
by
kingchandra.kanta
1
answer
When data are positively skewed, the mean will usually be
olympiad
class9
math
statistics
probability
answered
Jan 9, 2019
by
naeemurself
1
answer
The arethmetic mean and mode of the data is 24 and 12 respectively then the median of the data is
olympiad
class9
math
statistics
probability
answered
Dec 23, 2018
by
malhotrachandan93
1
answer
If mode and median of the certain scores are 2 and 2 then mean is
olympiad
class9
math
statistics
probability
answered
Dec 23, 2018
by
malhotrachandan93
1
answer
Which of the following provides a measure of central location for the data?
olympiad
class9
math
statistics
probability
answered
Nov 26, 2018
by
bhardwajekata
1
answer
If lower and upper quartiles of the data are 23 and 25 respectively , then coefficients of quartile deviation is
olympiad
class9
math
statistics
probability
answered
Nov 8, 2018
by
santoshkumar.sanu143
1
answer
which of the following is not the graphical representation of stastical data
olympiad
class9
math
statistics
probability
answered
Oct 19, 2018
by
shaikhshahrukh539
1
answer
If a three digit number is chosen at random , what is the probability that chosen number is a multiple of 3?
olympiad
class9
math
statistics
probability
answered
Sep 26, 2018
by
saravananmaths434
1
answer
Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?
olympiad
class9
math
statistics
probability
answered
Sep 26, 2018
by
saravananmaths434
1
answer
In a five number summary, which of the following is not used for data summarization?
olympiad
class9
math
statistics
probability
answered
Aug 7, 2018
by
nrojina91
2
answers
A dice is thrown. What is the probability that the number shown in the dice is divisible by 3?
olympiad
class9
math
statistics
probability
answered
Jul 8, 2018
by
vijayalakshmi.r
2
answers
Mean of a certain number of observations is m . If each observation is divided by $x(x\neq0)$ and increased by y, then the mean of new observation is
olympiad
class9
math
statistics
probability
answered
Feb 17, 2018
by
tanveeralampcm
1
answer
The median of 21 observations is 18. If two observations 15 and 24 are included to the observations then the median of the new series is
olympiad
class9
math
statistics
probability
answered
Jan 12, 2018
by
prabhu4c1
1
answer
If the mean of x+2, 2x+3, 3x+4 and 4x+5 is x+2 then find the value of x
olympiad
class9
math
statistics
probability
answered
Sep 13, 2017
by
pady_1
1
answer
Find the mean of first five natural numbers
olympiad
class9
math
statistics
probability
answered
Jun 29, 2017
by
taran2997
1
answer
The most frequently occurring value of a data set is called the
olympiad
class9
math
statistics
probability
answered
May 20, 2017
by
sanrhea
1
answer
A die is rolled twice. What is the probability of getting a sum equal to 9?
olympiad
class9
math
statistics
probability
answered
Jan 5, 2017
by
nishugupta0626
1
answer
One card is randomly drawn from a pack of 52 cards. What is the probability that the card drawn is a face card(Jack, Queen or King)
olympiad
class9
math
statistics
probability
answered
Dec 10, 2016
by
antimrao72
2
answers
The difference between the largest and the smallest data values is the
olympiad
class9
math
statistics
probability
answered
Nov 18, 2016
by
pady_1
1
answer
If the difference of mode and median of a data is 24, then the diffrence of median and mean is
olympiad
class9
math
statistics
probability
answered
Nov 8, 2016
by
aman6778
1
answer
Since the mode is the most frequently occurring data value, it
olympiad
class9
math
statistics
probability
answered
Oct 22, 2016
by
lakshmipallavi17
1
answer
Find The mean of first five multiples of 3
olympiad
class9
math
statistics
probability
answered
Mar 15, 2016
by
VISMAY1233
1
answer
Find the mean of all factors of 10
olympiad
class9
math
statistics
probability
answered
Mar 15, 2016
by
VISMAY1233
1
answer
If sum of the 20 deviations from the mean is 100, then the mean deviation is
olympiad
class9
math
statistics
probability
answered
Sep 11, 2015
by
_1
1
answer
The mean weight of 8 numbers is 15, If each number is multiplied by 2 , what will be the new mean?
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
If the mean of five observations $x,x+2,x+4,x+6,x+8$ is $11$, find the mean of first three observation
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
the mean of 5 numbers is 18 . If one numbers is excluded , their mean is 16 . Find the excluded number
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
In 2002, the average age of students at UTC was 22 with a standard deviation ofÂ 3.96. In 2003, the average age was 24 with a standard deviation of 4.08. Inwhich year do the ages show a more dispersed distribution?
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
Which of the following symbols represents the standard deviation of thepopulation?
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
The symbol \sigma is used to represent
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
The variance can never be
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
The median is a measure of
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
The variance of a sample of 169 observations equals 576. The standard deviation of the sample equals
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
The sum of the percent frequencies for all classes will always equal
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
The mean deviation of \large\frac{a+b}{2} and \large\frac{a-b}{2} (where a and b>0) is
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
The mean of first n odd natural numbers is $\large\frac{n^2}{81}$. Find n
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
Range of 14,12,17,18,16 and x is 20 . Find x(x>0)
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
The upper class limit of inclusive type class interval 10-20 is
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
If the quartile deviation of a set of observations is 10 and the third quartile is 35, then first quartile is
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
The mean of first n natural numbers is \large\frac{5n}{9}. Find n
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
If the heights of five students in a class are 132cm,158cm,150cm 145cm and 155cm,then find their mean height.
olympiad
class9
math
statistics
probability
asked
Aug 27, 2015
by
pady_1
0
answers
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