There are 100 marbles in a basket. 0.1 of them are pink marbles, and the rest are brown and green marbles. If there are 15 as many brown marbles as green marbles. How many green marbles are there?
Pink marbles |
Brown marbles |
Green marbles |
Total |
1 u |
9 u |
10 u |
|
1 p |
5 p |
|
0.1 =
110 =
110 Fraction of marbles that are brown and green marbles
= 1 -
110 =
910 Total number of marbles = 10 u
10 u = 100
1 u = 100 ÷ 10 = 10
Number of brown marbles and green marbles
= 9 u
= 9 x 10
= 90
Number of brown and green marbles
= 1 p + 5 p
= 6 p
6 p = 90
1 p = 90 ÷ 6 = 15
Number of green marbles
= 5 p
= 5 x 15
= 75
Answer(s): 75