Forty ladies and fifty gentlemen are present at a party. There are 20 couples among them. If a lady and a gentleman is selected at random, what is the probability that they will be not be a couple?  Pick one:	A) 1/200	B) 1/100	C) 99/100	D) 1/40	E) 1/20
In how many ways we can select a woman and a man from 40 women and 50 men? In 40*50 = 2,000 ways.   We have a total of 20 couples so, the probability of selecting a couple is 20/2,000 = 1/100.   the probability that they will be not be a couple = 1 - probability of selecting a couple   = 1 - (1/100)   = 99 / 100   Ans- 99/100
<result>C</result>
Forty ladies and fifty gentlemen are present at a party. There are 20 couples among them. If a lady and a gentleman is selected at random, what is the probability that they will be not be a couple?