tha average age of the in a class of 20 boys is 15.6 years.what well be the average age if 5 new boys come whose average age 15.4 year?
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Answered by
14
Average of 20 boys = 15.6
Average of 5 new boys = 15.4
New average of 25 boys = (15.6 * 20 + 15.4*5)/25 = 15.56 years
Average of 5 new boys = 15.4
New average of 25 boys = (15.6 * 20 + 15.4*5)/25 = 15.56 years
ram84:
this question is same different,43×7/25how came.
this question ans is 43×7/25 how came
in my calculation this is the answer
Answered by
10
the new average
= (20 × 15.6 + 5 × 15.4)/(20 + 5)
= (312 + 77)/25
= 389/25
= 15,56 year
= (20 × 15.6 + 5 × 15.4)/(20 + 5)
= (312 + 77)/25
= 389/25
= 15,56 year
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