**Quote:**

Can someone please help me with this question. I understand its a weighted average concept, but struggling to solve this.

avg height is 180

avg height of female=170

avg height of male=184

ratio of men to women= 180-170:184-180=5:2

It isn't 180-170 and 184-180 = 10:4 reducing into 5:2

Lets state it like this, since we already know the answer.

There are seven students in the class, 5 boys and 2 girls.

The 5 boys each weigh 184 pounds, with a collective weight of 920 pounds.

Both girls weigh 170 pounds.

What is the collective average weight of the class?

(184*5) + (170*2) = 1260/7