If you subtract the times periods form each you will be able to get your answer. So, 9:14-6:30 it will be 2 hours and 44 mins because from 6:30 to 7 it 30 mins, and from 7 to 9 it’s 2 hours. So far, add the two and you get 2h and 30mins and from 9 to 9:14 it’s 14 mins. So, 2h 30 mins plus 14 mins is 2h and 44mins.
First find the numbers that are divisible by 3. 3, 6, 9, 12, 15, 18, 21, 24 There are 8 numbers divisible by 3 so there are 16 that are not divisible by 3. P(not div by 3) = 16/24 = 2/3
