1.

If 2 is added to each of 5, 2, 7, 6, 5 does the mean increases by 2.Justify your answer.

Answer»

initial mean of all 5 numbers = (5+2+7+6+5)/5 = 25/5 = 5now add 2 in all numbers so resultant mean= (7+4+9+8+7)/5 = 35/5 = 7so mean is also increased by 2



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