Question

The mean of 5 number is 30. If one number is excluded their mean become 28. Find the excluded number. ​

Answer 1

Step-by-step explanation:

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Answer 2

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