There are 198 balls in a basket. 0.5 of them are purple balls, and the rest are brown and yellow balls. If there are 38 as many brown balls as yellow balls. How many yellow balls are there?
Purple balls |
Brown balls |
Yellow balls |
Total |
1 u |
1 u |
2 u |
|
3 p |
8 p |
|
0.5 =
510 =
12 Fraction of balls that are brown and yellow balls
= 1 -
12 =
12 Total number of balls = 2 u
2 u = 198
1 u = 198 ÷ 2 = 99
Number of brown balls and yellow balls
= 1 u
= 1 x 99
= 99
Number of brown and yellow balls
= 3 p + 8 p
= 11 p
11 p = 99
1 p = 99 ÷ 11 = 9
Number of yellow balls
= 8 p
= 8 x 9
= 72
Answer(s): 72