There are 100 beads in a basket. 0.2 of them are yellow beads, and the rest are purple and red beads. If there are 35 as many purple beads as red beads. How many red beads are there?
| Yellow beads |
Purple beads |
Red beads |
Total |
| 1 u |
4 u |
5 u |
| |
3 p |
5 p |
|
0.2 =
210 =
15 Fraction of beads that are purple and red beads
= 1 -
15 =
45 Total number of beads = 5 u
5 u = 100
1 u = 100 ÷ 5 = 20
Number of purple beads and red beads
= 4 u
= 4 x 20
= 80
Number of purple and red beads
= 3 p + 5 p
= 8 p
8 p = 80
1 p = 80 ÷ 8 = 10
Number of red beads
= 5 p
= 5 x 10
= 50
Answer(s): 50
