Fifteen telephones have just been received at an authorized

Fifteen telephones have just been received at an authorized service center and arc randomly assigned an order to be repaired Light of these telephones are cellular, five are cordless, and the other two are corded phones including one that is red What is the probability that two phones of each type (cellular, cordless, and corded) are among the first six phones serviced? What is the chance that the next phone serviced after the first corded phone is the red corded phone?

Solution

a)

Probability = 8C2 / 10C6 = 0.133

b)

Probability = 8C1 / 10C1 = 4/5