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Average - General Aptitude

Q1:

A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?

A Rs. 4991

B Rs. 5991

C Rs. 6001

D Rs. 6991

ANS:A - Rs. 4991

Total sale for 5 months = Rs. (6435 + 6927 + 6855 + 7230 + 6562) = Rs. 34009.  Required sale = Rs. [ (6500 x 6) - 34009 ]    = Rs. (39000 - 34009)    = Rs. 4991.