Asked by Nicole
A box contains 2 white calls and 7 pink balls. Two balls are drawn at random from the box.
a) If the first ball is drawn and not replaced, what is the probability that two balls will be drawn of different colors?
b) If the first ball is drawn and then put back, what is the probability that two balls will be drawn of different colors?
a) If the first ball is drawn and not replaced, what is the probability that two balls will be drawn of different colors?
b) If the first ball is drawn and then put back, what is the probability that two balls will be drawn of different colors?
Answers
Answered by
Reiny
P(WP) = (2/9)(7/8) = 7/36
P(PW) = (7/9)(2/*) = 7/36
Prob of your event = 7/36+7/36 = 7/18
if ball is replaced,
Prob(your event) = 2(2/9)(7/9) = 28/81
P(PW) = (7/9)(2/*) = 7/36
Prob of your event = 7/36+7/36 = 7/18
if ball is replaced,
Prob(your event) = 2(2/9)(7/9) = 28/81
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.