The probability of picking a card from a deck

Question

You chose one card from a standard deck. What is the probability of picking a red card or a 4?

Answer 1

Pr(R v 4) = Pr(R) + Pr(4) - Pr(R&4) = 13/52 + 4/52 - 2/52 = 15/52

Probability of drawing a red card or a four = 15/52 = about 28.8% chance