Question

If the mean of 5 numbers is 30 . If one number is excluded their mean becomes 28 . The excluded number is?

Answer 1

Answer:

Excluded number = 38

Step-by-step explanation:

The mean of the five numbers = 30

Then the sum of the 5 numbers

= 5 × 30 = 150

Now when one number is excluded, the mean becomes 28.

Then the sum of the 4 numbers

= 4 × 28 = 112

Then the number excluded be

= sum of 5 numbers - sum of 4 numbers

= 150 - 112 = 38

Note: The mean of a set of numbers is computed by dividing their sum by number of numbers present in the set.

Answer 2

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