There are 150 beads in a box. 0.3 of them are silver beads, and the rest are brown and grey beads. If there are 34 as many brown beads as grey beads. How many grey beads are there?
| Silver beads |
Brown beads |
Grey beads |
Total |
| 3 u |
7 u |
10 u |
| |
3 p |
4 p |
|
0.3 =
310 =
310 Fraction of beads that are brown and grey beads
= 1 -
310 =
710 Total number of beads = 10 u
10 u = 150
1 u = 150 ÷ 10 = 15
Number of brown beads and grey beads
= 7 u
= 7 x 15
= 105
Number of brown and grey beads
= 3 p + 4 p
= 7 p
7 p = 105
1 p = 105 ÷ 7 = 15
Number of grey beads
= 4 p
= 4 x 15
= 60
Answer(s): 60
