The average of n numbers x1,x2,x3…………,xn is A . If X1 is replaced by (x+a)x1 , X2 is replaced by (x+a)x2 ……then what is new average ?
The average of x1,x2,…..xn is A;
(x1+X2+X3+………Xn)/n =A ………………………………………(1)
=(x+a)A ………..from (1)
(Since (x1+X2+X3+………Xn)/n =A )
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