Answer:
5/12
Step-by-step explanation:
First, list the months by the number of days each has:
Jan: 31, Feb: 28 or 29, Mar: 31, Apr: 30, May: 31, Jun: 30, Jul: 31, Aug: 31, Sep: 30, Oct: 31, Nov: 30, Dec: 31.
How many of these 12 months have an even number of days?
Feb, Apr, Jun, Sep, Nov (assuming that we ignore Leap Year): 5 months
Then the probability that the selected month will have an even number of days is
5 months
--------------- = 5/12
12 months
