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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