There are 160 balls in a basket. 0.4 of them are black balls, and the rest are green and purple balls. If there are 15 as many green balls as purple balls. How many purple balls are there?
| Black balls |
Green balls |
Purple balls |
Total |
| 2 u |
3 u |
5 u |
| |
1 p |
5 p |
|
0.4 =
410 =
25 Fraction of balls that are green and purple balls
= 1 -
25 =
35 Total number of balls = 5 u
5 u = 160
1 u = 160 ÷ 5 = 32
Number of green balls and purple balls
= 3 u
= 3 x 32
= 96
Number of green and purple balls
= 1 p + 5 p
= 6 p
6 p = 96
1 p = 96 ÷ 6 = 16
Number of purple balls
= 5 p
= 5 x 16
= 80
Answer(s): 80
