Questions about fractions:

B 1:

If 4/7 of the 350 sophomores at Punjab College are girls, and 7/8 of the girls play on a team, how many sophomore girls do not play on a team?

B 2:

In the meat department of a supermarket, 100 pounds of chopped meat was divided into packages, each of which weighed 4/7 pound. How many packages were there?

B 3:

In a jar, half of the marbles are red, ¼ are white, and 1/5 are blue. What fraction of the marbles are neither red, white, nor blue?

Answer1:

There are 4/7 ×350 =200 sophomore girls.

Of those, 7/8 ×200 play on a team. Then, 200-175=25 does not play on a team.

Answer2:

100÷  4/7= 100 ×   7/4=175

Answer3:

The red, white and blue marbles constitute

(1/2)+(1/4)+(1/5)=19/20

Of the total, so

1-(19/20)=1/20

1/20 of the marbles are neither red, white, nor blue.