SSC CHSL MATHS(AVERAGE) QUIZ

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Question 1:

There are five numbers. The average of the first four numbers is $\frac{5}{6}$ of the fifth number. If the average of all the five numbers is 26 , then what is the fifth number ?

Question 2:

In a class of 30 students the average height of 15 students is ‘a’ cm. and that of remaining students is ‘b’ cm. Find the average height of whole class.

Question 3:

In a class average weight of 70 Boys is $51 \mathrm{~kg}$ and average weight of 30 girls is $47 \mathrm{~kg}$. Find out the average weight of the whole class:

Question 4:

The average age of students in a class is 16.8 years. The average age of the boys in the class is 18.4 years and that of the girls is 16.4 years. Find the ratio of the number of boys to the number of girls in the class.

Question 5:

The average age of Mukesh, Arpit, and Shivani is 39 years. Two years ago the average age of Mukesh and Arpit is 40 years two years hence the average of Uprant and Shivani is 46. Find persent age of Uprant?

Question 6:

The average of five numbers is 27 . If one number is excluded, the average becomes 25 . The excluded number is:

Question 7:

The average of 6 numbers is 8 and the average of 8 numbers is 6. What will be the average of both together?

Question 8:

In a class, the average weight of 40 boys is $65 \mathrm{~kg}$ and that of 50 girls is $60 \mathrm{~kg}$. After a few days, $40 \%$ of the girls and $50 \%$ of the boys leave. What would be the new average weight of the class (in $\mathrm{kg}$ )? Assume that the average weight of the boys and the girls remains constant throughout.

Question 9:

10 people went for shopping. 9 people purchased 7 plates each while 10th person purchase 9 more than average plates brought by all 10 people. Then the total number of plates brought by all 10 people is

Question 10:

The average of $1,3,5,7,9,11,13, \ldots .$ upto 41 terms is: