There are 160 beads in a box. 0.5 of them are white beads, and the rest are pink and black beads. If there are 37 as many pink beads as black beads. How many black beads are there?
| White beads |
Pink beads |
Black beads |
Total |
| 1 u |
1 u |
2 u |
| |
3 p |
7 p |
|
0.5 =
510 =
12 Fraction of beads that are pink and black beads
= 1 -
12 =
12 Total number of beads = 2 u
2 u = 160
1 u = 160 ÷ 2 = 80
Number of pink beads and black beads
= 1 u
= 1 x 80
= 80
Number of pink and black beads
= 3 p + 7 p
= 10 p
10 p = 80
1 p = 80 ÷ 10 = 8
Number of black beads
= 7 p
= 7 x 8
= 56
Answer(s): 56
