(1 point) Mike and Lisa are brother and sister. Mike has as many brothers as sisters, and Lisa has three times as many brothers

Question

4 years ago

5

as sisters. How many boys and girls are there in this family?

1 answer:

Elza [17] · Answer 1 · 2021-12-23T23:34:00+03:00

Answer:

Step-by-step explanation:

Given that Mike and Lisa are brother and sister. Mike has as many brothers as sisters, and Lisa has three times as many brothers as sisters

i.e. If Mike has x sisters, then he has x brothers.

i.e. no of sons in total = x+1 (including Mike)

No of daughters = x

Lisa's brothers = x+1 and and Lisa sisters = x-1 (exclusing Lisa)

Given that

$x+1 =3(x-1)\\2x =4\\x=2$

Hence we find that there are 3 sons and two daughters in the family.