There are 170 marbles in a basket. 0.2 of them are blue marbles, and the rest are green and white marbles. If there are 17 as many green marbles as white marbles. How many white marbles are there?
| Blue marbles |
Green marbles |
White marbles |
Total |
| 1 u |
4 u |
5 u |
| |
1 p |
7 p |
|
0.2 =
210 =
15 Fraction of marbles that are green and white marbles
= 1 -
15 =
45 Total number of marbles = 5 u
5 u = 170
1 u = 170 ÷ 5 = 34
Number of green marbles and white marbles
= 4 u
= 4 x 34
= 136
Number of green and white marbles
= 1 p + 7 p
= 8 p
8 p = 136
1 p = 136 ÷ 8 = 17
Number of white marbles
= 7 p
= 7 x 17
= 119
Answer(s): 119
