There are 160 marbles in a bag. 0.4 of them are yellow marbles, and the rest are red and blue marbles. If there are 17 as many red marbles as blue marbles. How many blue marbles are there?
| Yellow marbles |
Red marbles |
Blue marbles |
Total |
| 2 u |
3 u |
5 u |
| |
1 p |
7 p |
|
0.4 =
410 =
25 Fraction of marbles that are red and blue marbles
= 1 -
25 =
35 Total number of marbles = 5 u
5 u = 160
1 u = 160 ÷ 5 = 32
Number of red marbles and blue marbles
= 3 u
= 3 x 32
= 96
Number of red and blue marbles
= 1 p + 7 p
= 8 p
8 p = 96
1 p = 96 ÷ 8 = 12
Number of blue marbles
= 7 p
= 7 x 12
= 84
Answer(s): 84
