A month is randomly chosen. what is the probability that the month chosen has less than 31 days?

3/12 months

because it is 12 months in a year the probability would be about 3 months.

There are 4 months that are 30 days long and 7 months that are 31 days long.

So therefore the probability the the month chosen has less than 32 days is: 7/12. 7 out of 12 months