There are 200 balls in a basket. 0.2 of them are white balls, and the rest are red and green balls. If there are 37 as many red balls as green balls. How many green balls are there?
| White balls |
Red balls |
Green balls |
Total |
| 1 u |
4 u |
5 u |
| |
3 p |
7 p |
|
0.2 =
210 =
15 Fraction of balls that are red and green balls
= 1 -
15 =
45 Total number of balls = 5 u
5 u = 200
1 u = 200 ÷ 5 = 40
Number of red balls and green balls
= 4 u
= 4 x 40
= 160
Number of red and green balls
= 3 p + 7 p
= 10 p
10 p = 160
1 p = 160 ÷ 10 = 16
Number of green balls
= 7 p
= 7 x 16
= 112
Answer(s): 112
