There are 165 marbles in a bag. 0.4 of them are silver marbles, and the rest are brown and gold marbles. If there are 18 as many brown marbles as gold marbles. How many gold marbles are there?
| Silver marbles |
Brown marbles |
Gold marbles |
Total |
| 2 u |
3 u |
5 u |
| |
1 p |
8 p |
|
0.4 =
410 =
25 Fraction of marbles that are brown and gold marbles
= 1 -
25 =
35 Total number of marbles = 5 u
5 u = 165
1 u = 165 ÷ 5 = 33
Number of brown marbles and gold marbles
= 3 u
= 3 x 33
= 99
Number of brown and gold marbles
= 1 p + 8 p
= 9 p
9 p = 99
1 p = 99 ÷ 9 = 11
Number of gold marbles
= 8 p
= 8 x 11
= 88
Answer(s): 88
