Question

Out of 60 days on 39 of those days she arived at work before 8:30 asm what is the probability she will arrive at work after 8:30 am

Answer 1

Out of 60 days a person arrives before 8.30 am for = 39 days

So remaining days left are =
`60-39=21` days

So probability that a person will arrive after 8.30 am is =
`(21)/(60)`

or
`(7)/(20)`

Hence, probability is
`(7)/(20)`