The probability that Fred's bus is late on any day is 0.09. Fred took the bus 400 times last year.
How many times would you expect the bus to have been late?

The bus would be 36 times late in 400 times of when Fred takes the bus

Step-by-step explanation:

Given that the probability of being the bus late is 0.09.

In order to find the number of times the bus will be late will be calculated by multiplying the total number of observations by probability.

It is also given that the total number of days he waits for bus is 400 times.

So,

The bus will be:

Hence,

The bus would be 36 times late in 400 times of when Fred takes the bus

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.

b, i believe, but not sure.