1. a used-car lot has 120 vehicles for sale. a sample of 15 of these vehicles finds that 6 of them have previously been in an accident. what is the best estimate of the percent of the used-car lot's vehicles that have previously been in an accident? enter your answer in the box. _% 2. two number cubes are rolled. each number cube has sides numbered 1 through 6. what is the probability that the outcome of the roll is an even sum or a sum that is a multiple of 3? enter your answer, in simplest fraction form, in the box. _

Part 1

A used-car lot has 120 vehicles for sale. Since a sample of 15 of these vehicles finds that 6 of them have previously been in an accident. That means that the probability of finding a an accident car is

when the number of cars is 120, the number of accident cars will be:

Thus the best estimate of the percent of the used-car lot's vehicles that have previously been in an accident is 48.

Part 2

The total sample space of the sums has outcomes.

Out of this, the required events are:

Which is 24 in number.

Thus the probability required is

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225