There are 160 balls in a basket. 0.3 of them are green balls, and the rest are gold and grey balls. If there are 34 as many gold balls as grey balls. How many grey balls are there?
| Green balls |
Gold balls |
Grey balls |
Total |
| 3 u |
7 u |
10 u |
| |
3 p |
4 p |
|
0.3 =
310 =
310 Fraction of balls that are gold and grey balls
= 1 -
310 =
710 Total number of balls = 10 u
10 u = 160
1 u = 160 ÷ 10 = 16
Number of gold balls and grey balls
= 7 u
= 7 x 16
= 112
Number of gold and grey balls
= 3 p + 4 p
= 7 p
7 p = 112
1 p = 112 ÷ 7 = 16
Number of grey balls
= 4 p
= 4 x 16
= 64
Answer(s): 64
