The mean of 5 number is 30. If one number is excluded their mean become 28. Find the excluded number.
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Step-by-step explanation:
FIRST CASE
average = 30
no. of quantity-5
avg.=sum/no. of quantity
30=sum/5
sum=150
SECOND CASE
avg. - 28
no of quantity - 4
28=sum/4
sum=112
the excluded number is = 150-112
=38
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