There are 200 marbles in a box. 0.4 of them are blue marbles, and the rest are silver and yellow marbles. If there are 17 as many silver marbles as yellow marbles. How many yellow marbles are there?
| Blue marbles |
Silver marbles |
Yellow marbles |
Total |
| 2 u |
3 u |
5 u |
| |
1 p |
7 p |
|
0.4 =
410 =
25 Fraction of marbles that are silver and yellow marbles
= 1 -
25 =
35 Total number of marbles = 5 u
5 u = 200
1 u = 200 ÷ 5 = 40
Number of silver marbles and yellow marbles
= 3 u
= 3 x 40
= 120
Number of silver and yellow marbles
= 1 p + 7 p
= 8 p
8 p = 120
1 p = 120 ÷ 8 = 15
Number of yellow marbles
= 7 p
= 7 x 15
= 105
Answer(s): 105
