i want help of you in 2 questions
if the s.d. of the first n natural no. is 2, then what is the value of n?
2) the mean and s.d of a b and 2 are 3 and 1 respectively.then what is the value of ab
plz. reply early its solution
thanks in advance
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Can anybody please help me?
Replies (2)
USE THIS FORMULA SD= (N^2 -1)^.5
2=(N^2-1)^.5
WE WILL GET N=7
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