Question

$the \: mean \: of \: five \: numbers \: is \: 30 \: if \: one \: number \: is \: excluded \: their \: mean \: becomes \: 28 \: so \: what \: is \: the \: exclueded \: number$
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Answer 1

Step-by-step explanation:

mean of 5 numbers=30

so sum of 5 numbers=30*5=150

let the no excluded=x

so sum becomes=150-x

now the mean of 4 no's=28

so sum of 4 no's=28*4=112

so 150-x=112

or x=150-112

=38

so the excluded no is 38