Let number of red balls be = x
P(red ball) =
x
12
If 6 more red balls are added:
The number of red balls = x + 6
P(red ball) =
x 6
18
Since,
x 6 x 2 x 3
18 12
There are 3 red balls in the bag.
Written on Jan. 21, 2018, 11:21 a.m.