There are 132 beads in a bag. 0.5 of them are silver beads, and the rest are gold and grey beads. If there are 15 as many gold beads as grey beads. How many grey beads are there?
| Silver beads |
Gold beads |
Grey beads |
Total |
| 1 u |
1 u |
2 u |
| |
1 p |
5 p |
|
0.5 =
510 =
12 Fraction of beads that are gold and grey beads
= 1 -
12 =
12 Total number of beads = 2 u
2 u = 132
1 u = 132 ÷ 2 = 66
Number of gold beads and grey beads
= 1 u
= 1 x 66
= 66
Number of gold and grey beads
= 1 p + 5 p
= 6 p
6 p = 66
1 p = 66 ÷ 6 = 11
Number of grey beads
= 5 p
= 5 x 11
= 55
Answer(s): 55
