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Question
Marks obtained (in mathematics) by 9 student are given below:
60, 67, 52, 76, 50, 51, 74, 45 and 56
if marks of each student be increased by 4; what will be the new value of arithmetic mean.
Solution
If marks of each student be incresed by 4 then new arithmetic mean will be = 59+4=63
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