Question

What is the probability that a month picked at random will have 31 days?

A.5/12
B.4/12
C.7/12
D.8/12

Answer 1

There are 12 months.  7 of them have 31 days (Jan, Mar, May, July, Aug, Oct, Dec).  4 of them have 30 days (Apr, June, Sep, Nov).  1 of them has 28 or 29 days (Feb).  Based on this knowledge, the probability of picking a month with 31 days at random is C, 7/12.