Q5. a) A class contain 10 men and 20 women of which half the men and half the women have brown eyes. Find the probability that a person chosen at random is a man or has brown eyes. b) A box contains4...

Q5.

a) A class contain 10 men and 20 women of which half the men and half the
women have brown eyes. Find the probability that a person chosen at random
is a man or has brown eyes.

b) A box contains4 bad and 6 good tubes. Two are drawn out together. One of
them is tested and found to be good. What is the probability that the other
one is also good?

c) A box contains 10 red and 12 white rose flowers. Flowers are picked up at
random one by one without replacement. What is the probability that;

1. There are 2 red and 2 white flowers in the first four picked up?

2. The third one is red given the first 2 are white?