Question

in the year 1950 the average age of six brothers is 15 years youngest brother died in 1957 at the age of 12 years find the average of remaining Brothers in 1958​

Answer 1

Answer:

as per my opinion I think that the answer will be 20 years.

Answer 2

Average age of rest five brother after death of younger brother is 15.6 years

Step-by-step explanation:

Given as :

The average age of six brothers is 15 years

The age of younger brother = 12 years

Let The average age of left five brothers = A years

According to question

∵  average age of six brothers is 15 years

i.e  $\dfrac{x_1+x_2+x_3+x_4+x_5+x_6}{6}$  = 15

Or, $\dfrac{x_1+x_2+x_3+x_4+x_5+12}{6}$  = 15

Or,  ${x_1+x_2+x_3+x_4+x_5+12}$  = 15 × 6

Or,  ${x_1+x_2+x_3+x_4+x_5+12}$  = 90

∴   $x_1+x_2+x_3+x_4+x_5$  = 90 - 12

Or, $x_1+x_2+x_3+x_4+x_5$ = 78

Again

The Average age of rest five brother after death of younger brother = A

Or,,  A = $\dfrac{x_1+x_2+x_3+x_4+x_5}{5}$

Or,   A = $\dfrac{78}{5}$

∴     Average = 15.6 years

So, The Average age of rest five brother after death of younger brother = A = 15.6 years

Hence, Average age of rest five brother after death of younger brother is 15.6 years  Answer