Use the General Addition Rule
-One hundred people were asked, "Do you favor stronger laws on gun control?" Of the 33 that answered "yes" to the question, 14 were male. Of the 67 that answered "no" to the question, six were male. If one person is selected at random, what is the probability that this person answered "yes" or was a male?
A) $0.39$
B) $0.53$
C) $0.67$
D) $0.13$

Question

Quizplus · Accepted Answer

The probability of answering "yes" is 33/100 and the probability of being male is (14+6)/100 = 20/100. The probability of answering "yes" or being male is the sum of these probabilities minus the probability of both (which is 14/100). So, the probability is (33/100) + (20/100) - (14/100) = 39/100 = 0.39.

Use the General Addition Rule -One Hundred People Were Asked 0.390.390.39

Use the General Addition Rule
-One Hundred People Were Asked $0.39$