Question

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

विकल्प

• 55

• 60

• 75

• None of these

Answer 1

55
Explanation:
Let number of numbers = x

Then, `50 =450/x`

⇒         `x=450/50=9 `

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