There are 120 balls in a basket. 0.1 of them are red balls, and the rest are gold and blue balls. If there are 18 as many gold balls as blue balls. How many blue balls are there?
| Red balls |
Gold balls |
Blue balls |
Total |
| 1 u |
9 u |
10 u |
| |
1 p |
8 p |
|
0.1 =
110 =
110 Fraction of balls that are gold and blue balls
= 1 -
110 =
910 Total number of balls = 10 u
10 u = 120
1 u = 120 ÷ 10 = 12
Number of gold balls and blue balls
= 9 u
= 9 x 12
= 108
Number of gold and blue balls
= 1 p + 8 p
= 9 p
9 p = 108
1 p = 108 ÷ 9 = 12
Number of blue balls
= 8 p
= 8 x 12
= 96
Answer(s): 96
