A box of 19 transistors has 5 defective ones. (Enter your probabilities as fractions.)

(a) If 2 transistors are drawn from the box together, what is the probability that both transistors are defective?

(b) If 2 transistors are drawn from the box together, what is the probability that neither transistor is defective?

(c) If 2 transistors are drawn from the box together, what is the probability that one transistor is defective?