There are 150 marbles in a bag. 0.1 of them are red marbles, and the rest are pink and gold marbles. If there are 18 as many pink marbles as gold marbles. How many gold marbles are there?
| Red marbles |
Pink marbles |
Gold marbles |
Total |
| 1 u |
9 u |
10 u |
| |
1 p |
8 p |
|
0.1 =
110 =
110 Fraction of marbles that are pink and gold marbles
= 1 -
110 =
910 Total number of marbles = 10 u
10 u = 150
1 u = 150 ÷ 10 = 15
Number of pink marbles and gold marbles
= 9 u
= 9 x 15
= 135
Number of pink and gold marbles
= 1 p + 8 p
= 9 p
9 p = 135
1 p = 135 ÷ 9 = 15
Number of gold marbles
= 8 p
= 8 x 15
= 120
Answer(s): 120
