9. an express delivery service advertises next-day delivery of any parcel it receives before 3pm. the actual success rate is 90%. a random sample of 16 parcels were chosen.

a. calculate the probability that all 16 were delivered by the next day.

b. what is the probability that 12 or fewer were delivered on time?

Pam buys a sleeve of ball bearings for her skateboard. each of the bearings is 1 1/5 inches wide. the sleeve is 9 3/5 inches long. how many ball bearings are in the sleeve? show your work.

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Graph y = -|x| + 2. click on the graph until the correct one appears.