In how many ways can a committee of 5 boys and 4 girls be fo

In how many ways can a committee of 5 boys and 4 girls be formed from a group of 21 high school students if only one third of that group is girls? 293, 030 2,002 70, 070 35 Three cards are drawn without replacement from a deck of 52 cards, find the probability that the first is a black face card, the second is a red number card, and the third is the 7 of spades 1/1105 14/1105 120/1105 480/1105 A box contains 12 light bulbs 2 of which are defective. If a quality controller picks 3 bulbs at random, what is the probability that one of them is defective? 0.167 0.333 0.255 0.409

Solution

18.The answer is option c = (14C5)X(7C4)

19. The answer is option c = (6c1/52) X (20C1/51) X (1/50)

20. The answer is option d = (10C2 X 2C1) / (12C3)