Question
The average of 16 numbers is 36.5. If four numbers of
average x are added to them, then the average of all numbers increases by one. Find the value of x?Solution
Average of 16 numbers is =36.5 total of 16 numbers =36.5×16 =584 If four numbers of average =x total of 4 numbers = 4x ATQ- after Average increase by 1 (584+4x)/20 = 37.5 584+4x =37.5×20=750 4x = 166 x = 41.50
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