Question 71

Average of 11 numbers is 32. If the average of first six numbers is 26 and the average of last six numbers is 36 then what is the value of the sixth number?

Solution

Given the average of 11 numbers is 32 i.e;

sum/11=32

sum of the numbers=32$$\times\ $$11=352

given that average of first 6 numbers is 26

sum/6=26

sum = 156.

average of last 6 numbers is 36

sum/6=36

sum=216.

add the sum of first 6 numbers and last 6 numbers

216+156=372

to get the value of 6th number subtract 352 from 372

372-352=20

therefore answer=20

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