Question

find the mean by shortcut method S No. 1 2 3 4 5 6 7 8 9 10 marks 43 60 47 48 65 48 57 78 31 59​

Answer 1

Calculating the average using direct method:

Average (X)=ΣXN

or, X =

2+3+5+6+8+10+11+13+17+2010

or, X =9510

⇒X=9.5

Hence, the average of the above individual data is 9.5

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