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Anastaziya [24]
2 years ago
15

In a family, each brother has as many sisters as broth, but

Mathematics
1 answer:
irina [24]2 years ago
8 0

Answer: 4 brothers and 3 sisters for a total of 7 siblings

Step-by-step explanation:

Let No. of boys = x

Let No. of girls = y

<u>Each boy has as many brothers as sisters</u>

Hence, (x - 1) = y

Rearranging we get,

x - y = 1 ……….(1)

<u>Now, each girl has twice as many brothers as that of sisters</u>

Hence, 2 * (y - 1) = x

Solving the bracket we get, 2y - 2 = x

Rearranging we get,

-x + 2y = 2 ……….(2)

Adding (1) and (2) using the elimination method, we get

x - y = 1

-x + 2y = 2

<u>y = 3</u>

Substituting value of Y in equation (1),

x - 3 = 1

Solving this we get,

x = 4

Thus, No. of Boys = 4, No. of Girls = 3 and No. of Siblings in the family = 7

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