Question

The mean of 5 no.s is 18 if one no. Is excluded the mean is 16 find the xclyded no.

Answer 1

(y+x)/5=18
y+x=90 eq(I)
y/4=16
y=64 eq(2)
subtracting eq1 and eq 2
x=26 (Ans)

Answer 2

hi friend,

let p,q,r,s,t be 5 numbers

<>mean of 5 numbers is 18

→p+q+r+s+t/5=18

→p+q+r+s+t=90----(1)

let 't' be removed,

then mean of 4 numbers is 16

→p+q+r+s/4=16

→p+q+r+s=64----(2)
now, t=(1)-(2)

=90-64=26

I hope this will help u ;)