There are 200 balls in a basket. 0.2 of them are red balls, and the rest are blue and purple balls. If there are 35 as many blue balls as purple balls. How many purple balls are there?
| Red balls |
Blue balls |
Purple balls |
Total |
| 1 u |
4 u |
5 u |
| |
3 p |
5 p |
|
0.2 =
210 =
15 Fraction of balls that are blue and purple balls
= 1 -
15 =
45 Total number of balls = 5 u
5 u = 200
1 u = 200 ÷ 5 = 40
Number of blue balls and purple balls
= 4 u
= 4 x 40
= 160
Number of blue and purple balls
= 3 p + 5 p
= 8 p
8 p = 160
1 p = 160 ÷ 8 = 20
Number of purple balls
= 5 p
= 5 x 20
= 100
Answer(s): 100
