There is only two possible outcomes, either pass or fail the test.RedAngryBird wrote:PLS HELP IN THIS QUESTION!!!!!
The Probability that Lisa and Meiling will pass a driving test are 2/3 and 3/8 respectively. Find the probability that
a)both Lisa and Meiling will pass the test.
b)only one of them will pass the test.
P(Lisa pass) = 2/3
P(Lisa fail) = 1 - 2/3 = 1/3
P(Meiling pass) = 3/8
P(Meiling fail) = 5/8
a) P(Lisa and Meiling pass) = 2/3 x 3/8 = 1/4
b) Since only one pass, the other person will fail. So it is possible that Meiling pass and Lisa fail OR Lisa pass and Meiling fail.
P(only one pass) = 3/8 x 1/3 + 2/3 x 5/8 = 13/24