Question

In a family there are some boys and girls. all boys told that they are having equal no of brothers and sisters and girls told that they are having twice the no. of brothers than sisters. how many boys and girls present in a family

Answer 1

4 boys and 3 girls...

Answer 2

Answer:

Explanation:

Let No. of boys = X

Let No. of girls = Y

Each boy has as many brothers as sisters

Hence, (X - 1) = Y

Rearranging we get,

X - Y = 1 ……….(1)

Now, each girl has twice as many brothers as that of sisters

Hence, 2 * (Y - 1) = X

Solving the bracket we get, 2Y - 2 = X

Rearranging we get,

-X + 2Y = 2 ……….(2)

Adding (1) and (2), we get

Y = 3

Substituting value of Y in equation (1),

X - 3 = 1