I need help on a probability question please. Thanks in advance. Here it is:
1/3 of the people in a club are men.
The number of men in the club is n.
a) Write down an expression, in terms of n, for th enumber of people in the club.
b) Two of the people in the club are chosen at random. The probability that both these people are men is one tenth. Calculate the number of people in the club.
Thanks for any help!