There are 170 marbles in a bag. 0.1 of them are white marbles, and the rest are green and brown marbles. If there are 18 as many green marbles as brown marbles. How many brown marbles are there?
| White marbles |
Green marbles |
Brown marbles |
Total |
| 1 u |
9 u |
10 u |
| |
1 p |
8 p |
|
0.1 =
110 =
110 Fraction of marbles that are green and brown marbles
= 1 -
110 =
910 Total number of marbles = 10 u
10 u = 170
1 u = 170 ÷ 10 = 17
Number of green marbles and brown marbles
= 9 u
= 9 x 17
= 153
Number of green and brown marbles
= 1 p + 8 p
= 9 p
9 p = 153
1 p = 153 ÷ 9 = 17
Number of brown marbles
= 8 p
= 8 x 17
= 136
Answer(s): 136
