Answer:
Explanation:
If I am understanding this question correctly, you are being asked
how many green balls are in bag x if the probability of picking green from bag x is equal to the probability of picking red from bag y.
The probability of red:
P (red counter from bag y) =
which is equal to .40 or 40%
2 red balls in bag y and 5 total balls.
So what is the number of green balls needed to have a 40% probability of
picking green from bag x ? remember bag x has a total of 30 balls.
P (green counter from bag x = .40 (make it 40% in the equation)
P =
=
cross mulitply: 30 X 40 = 1200
divide by 100 = 1200 ÷ 100
= 12 green balls in bag x for the probabilities to be even.
You could also just multiply the 30 total balls in bag x by the probability of a red ball from bag y and get 12.
30 x 2/5 = 60/5 = 12
12 green counters in bag x