shining74 shining74

07-09-2019
Mathematics

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the average age of a group of 13 boys is 13 when 2 more boys join the group. the average rose by 2 years the sum of the ages of two new boys

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devishri1977 devishri1977

07-09-2019

Answer:

The sum of age of the two new boys = 56 years

Step-by-step explanation:

The average age of a group of 13 boys = 13

The sum of age of the 13 boys = 13 * 13 = 169

The average age of a group of 15 boys = 15

The sum of age of the 15 boys = 15 * 15 = 225

The sum of age of the two new boys = 225 - 169 = 56 years

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