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If the Sum of a Few Numbers is 450 and Their Mean is 50 If Another Number 100 is Included, the Mean Would Become - Mathematics

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MCQ

If the sum of a few numbers is 450 and their mean is 50 if another number 100 is included, the mean would become

Options

  • 55

  • 60

  • 75

  • None of these

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Solution

55
Explanation:
Let number of numbers = x

Then, `50 =450/x`

⇒         `x=450/50=9 `

New mean`=(9xx50+100)/10 = 550/10=55`

Concept: Average and Age
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