Question

the mean of 6 no. is 23. if one is excluded,the mean of the remaining no. is 20. Find the excluded no.

Answer 1

X=summation fixi/summation fi

23=summation fixi/6

Summation fixi=138

When a no. Is excluded

Mean=20

Let the excluded no. Be x

20=(138-x)/5

100=138-x

X=38

Excluded no. Is 38