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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