Solution:
(a) Mean 
Here, 
Therefore,
(b) If the marks of each student is increased by 4 then the new arithmetic mean will be 
Marks obtained (in mathematics) by 9 student are given below: 
and 56
(a) find the arithmetic mean)
(b) if marks of each student be increased by
what will be the new value of arithmetic mean.
and 56 (a) find the arithmetic mean)
(b) if marks of each student be increased by
what will be the new value of arithmetic mean.Marks obtained (in mathematics) by 9 student are given below: and 56
(a) find the arithmetic mean)
(b) if marks of each student be increased by what will be the new value of arithmetic mean.
and 56 (a) find the arithmetic mean)
(b) if marks of each student be increased by
what will be the new value of arithmetic mean.More Material
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