Average problems for bank exams with solutions

Average Problems with Solutions for SSC and Bank Exams

Q.6.If the mean of 5 observation x, x+2, x+4, x+6 and x+8 is 11, then the mean of the last three observation is :

Solution:

so, the numbers are 7,9,11,13,15.

Q.7.The average of then two digit numbers, which remain the same when the digits interchange their position, is :

Solution:

Q.8. Find the average of all prime number between 30 and 50.

Solution: There are five prime number between 30 and 50.

They are 31, 37, 41, 43 and 47.

Q.9. Find the average of first 40 natural numbers.

Solution: 

∴ Required average =

Q.10. Find the average of first 20 multiple of 7.

  Solution: Required average =

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