There are 120 marbles in a basket. 0.5 of them are yellow marbles, and the rest are white and grey marbles. If there are 14 as many white marbles as grey marbles. How many grey marbles are there?
| Yellow marbles |
White marbles |
Grey marbles |
Total |
| 1 u |
1 u |
2 u |
| |
1 p |
4 p |
|
0.5 =
510 =
12 Fraction of marbles that are white and grey marbles
= 1 -
12 =
12 Total number of marbles = 2 u
2 u = 120
1 u = 120 ÷ 2 = 60
Number of white marbles and grey marbles
= 1 u
= 1 x 60
= 60
Number of white and grey marbles
= 1 p + 4 p
= 5 p
5 p = 60
1 p = 60 ÷ 5 = 12
Number of grey marbles
= 4 p
= 4 x 12
= 48
Answer(s): 48
