Recent questions tagged class7

In an office, the age of the employees was as follows 30 , 26 , 27 , 37 , 14 , 50 , 45 , 53 , 48 , 51 , 38 , 25 What is the average of their ages?

asked Oct 14, 2015 by pady_1

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If the probability of winning a game is 0.8, what is the probability of losing it ?

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A dice is thrown once. What is the probability of getting 2 ?

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What is the new median, when 36 is added to the data : 32, 34,36,38,40,42,44?

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What is the value of x if the median of given data is 18 : 15, 16, 17, x + 2, 19, 20, 21?

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If 23 is taken out from the given data then what is the new median?20, 21,22, 23, 24, 25, 26,27

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Find the value of x if the mode of the following data is 7 : 5, 4, 7, 4, 7, x, 7, 4, 3,5

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The ages in years of 9 teachers in a school are : 23, 34, 37, 39, 41,43,45,47. find the median

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Find the median of first 8 even natural numbers

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Find the median of first 7 odd natural numbers.

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Find the median of the data : 41, 43, 46, 48, 49, 52, 53, 55,56

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Find the median : 6, 8, 9, 15, 21, 25, 28, 29

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The marks obtained by 6 students of a class 7th in a test are given below : 12, 15, 23,23, 19, 21. Find the median.

asked Oct 14, 2015 by pady_1

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Ria's age is twice that of Balvinder, Balvinder's age is twice that of George and George's age is twice that of Radha. If the average of the ages of Ria, Balvinder, George and Radha is 22.5 years, then what is the present age of Ria.

asked Oct 14, 2015 by pady_1

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Pradip throws a die. What is the probability that he rolls a number less than 6?

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Find the mean of first 8 multipliers of 7.

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What is the average of the 7 consecutive integers starting at 21?

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From a deck of cards, Sara withdraws a card at random. What is the probability that the card is a King?

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If there are n numbers of which one is(1-\large\frac{1}{n^5}) and all the others are 1's, then by how much is the arithmetic mean of these numbers less than 1.

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A teacher measures the heights of 11 students in her class as follows (in centimetres) 124 , 138 , 111 , 118 , 145 , 155 , 154 , 143 , 131 , 144 , 129 What is the median of their heights?

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If a die is thrown, what is the probability of getting an odd number?

asked Oct 14, 2015 by pady_1

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Shyam got an average of 71 in 3 tests. What does he need to score on the next test to get his average up to 73?

asked Oct 14, 2015 by pady_1

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Sachin throws a die. What is the probability that he rolls a number less than 3?

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Priyanka measures the heights of 9 of her friends as follows (in centimetres) 130 , 116 , 123 , 119 , 146.7 , 133 , 140 , 150 , 133 What is the average of their heights?

asked Oct 14, 2015 by pady_1

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Archana's age is twice that of Alisha, Alisha's age is twice that of Sara and Sara's age is twice that of Balvinder. If the average of the ages of Archana, Alisha, Sara and Balvinder is 30 years, then what is the present age of Sara.

asked Oct 14, 2015 by pady_1

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The average of any four consecutive odd integers is always

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In an office, the age of the employees was as follows 27 , 30 , 54 , 51 , 40 , 50 , 26 , 51 , 38 , 50 , 34 What is the average of their ages?

asked Oct 14, 2015 by pady_1

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Sneha throws a die. What is the probability that she rolls a number more than 1?

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Find the mean of all the internal angles in a pentagon.

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From a deck of cards, Raj withdraws a card at random. What is the probability that the card is a red King?

asked Oct 14, 2015 by pady_1

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From a deck of cards, Tina withdraws a card at random. What is the probability that the card is red facecard (one of king, queen, jack )?

asked Oct 14, 2015 by pady_1

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The marks obtained by 6 students of a class 7th in a test are given below : 12, 15, 23,23, 19, 21. Find the median?

asked Oct 14, 2015 by pady_1

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What is the mean of first 5 multiples of 2 ?

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What is the class mark of the class 30 - 40 ?

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If the mean of three observations, x + 2, x + 4, x + 6, is 15. Find x

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The mean of 5 numbers is 28. If one number is excluded, their mean is 26. Find the excluded number

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The mean of 4, 3, x + 3, 9, 10 is 7. Find the value of x ?

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The mean of 8, 4, 5, x and 10 is 8. Find the value of x?

asked Oct 14, 2015 by pady_1

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The mean of five numbers is 18. If one numbers is excluded, their mean is 16. What is the excluded number?

asked Oct 14, 2015 by pady_1

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Find the mean of 8, 12,5,6,10,7

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The average runs scored by a cricketer in 6 innings is 55, find his total score?

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What is the range of the following data : 46, 63, 25, 23,39.42,21,47,68?

asked Oct 14, 2015 by pady_1

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The age in years of 8 teachers of a school are 41, 28, 54, 35, 26, 33, 40, 39, find the mean?

asked Oct 14, 2015 by pady_1

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The marks scored by a student in five subjects are 80, 75, 66, 51 and 91. How muchshould he score in the 6th subject to make his average score 75?

asked Oct 14, 2015 by pady_1

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The average marks scored by a student in five subjects is 72. Find his total marks.

asked Oct 14, 2015 by pady_1

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Calculate the mean of 2, 4, 6, 8, 10,12,14,16 .

asked Oct 14, 2015 by pady_1

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Find mean of the first seven whole number.

asked Oct 14, 2015 by pady_1

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A triangular pyramid is called a …………….. .

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The point at which three faces of a figure meet is known as its …………….. .

asked Oct 14, 2015 by pady_1

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A pyramid with square base has 5 faces and 8 edges. By Euler’s formula, find the vertices of the pyramid.

asked Oct 14, 2015 by pady_1

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