Recent questions and answers in Statistics and Probability

Raja has 4 tickets of a lottery for which 12 tickets were sold and 3 prices are to be given. What is the probability that Raja will win at least one price?

answered Jan 18, 2022 by anveshyadavanvi

1 answer

The probability A getting a job is 1/5 and that of B is 1/7 .What is the probability that only one of them gets a job?

answered Oct 15, 2020 by rathodanuradha012

1 answer

The mean weight of 8 numbers is 15, If each number is multiplied by 2 , what will be the new mean?

answered Jul 23, 2020 by shivanshu.rajput99

1 answer

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?

answered Jun 10, 2020 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

answered Feb 2, 2020 by rupamyogya

2 answers

The 75th percentile is referred to as the

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 ?

answered Jul 26, 2019 by monga.nalini1110

1 answer

The median of a sample will always equal the

answered Jul 12, 2019 by atif685iqbal

2 answers

5 coins are tossed together. What is the probability of getting exactly 2 heads?

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?

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

answered Mar 4, 2019 by muhamedamer3131

1 answer

Since the population size is always larger than the sample size, then the sample statistic

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

answered Jan 29, 2019 by kingchandra.kanta

1 answer

When data are positively skewed, the mean will usually be

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

answered Dec 23, 2018 by malhotrachandan93

1 answer

If mode and median of the certain scores are 2 and 2 then mean is

answered Dec 23, 2018 by malhotrachandan93

1 answer

Which of the following provides a measure of central location for the data?

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

answered Nov 8, 2018 by santoshkumar.sanu143

1 answer

which of the following is not the graphical representation of stastical data

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?

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?

answered Sep 26, 2018 by saravananmaths434

1 answer

In a five number summary, which of the following is not used for data summarization?

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?

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

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

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

answered Sep 13, 2017 by pady_1

1 answer

Find the mean of first five natural numbers

answered Jun 29, 2017 by taran2997

1 answer

The most frequently occurring value of a data set is called the

answered May 20, 2017 by sanrhea

1 answer

A die is rolled twice. What is the probability of getting a sum equal to 9?

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)

answered Dec 10, 2016 by antimrao72

2 answers

The difference between the largest and the smallest data values is the

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

answered Nov 8, 2016 by aman6778

1 answer

Since the mode is the most frequently occurring data value, it

answered Oct 22, 2016 by lakshmipallavi17

1 answer

Find The mean of first five multiples of 3

answered Mar 15, 2016 by VISMAY1233

1 answer

Find the mean of all factors of 10

answered Mar 15, 2016 by VISMAY1233

1 answer

If sum of the 20 deviations from the mean is 100, then the mean deviation is

answered Sep 11, 2015 by _1

1 answer

If the mean of five observations $x,x+2,x+4,x+6,x+8$ is $11$ , find the mean of first three observation

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

asked Aug 27, 2015 by pady_1

0 answers

In 2002, the average age of students at UTC was 22 with a standard deviation of 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?

asked Aug 27, 2015 by pady_1

0 answers

The symbol \sigma is used to represent

asked Aug 27, 2015 by pady_1

0 answers

Which of the following symbols represents the standard deviation of thepopulation?

asked Aug 27, 2015 by pady_1

0 answers

The variance can never be

asked Aug 27, 2015 by pady_1

0 answers

The median is a measure of

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

asked Aug 27, 2015 by pady_1

0 answers

The sum of the percent frequencies for all classes will always equal

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

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

asked Aug 27, 2015 by pady_1

0 answers

Range of 14,12,17,18,16 and x is 20 . Find x(x>0)

asked Aug 27, 2015 by pady_1

0 answers

The upper class limit of inclusive type class interval 10-20 is

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

asked Aug 27, 2015 by pady_1

0 answers

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