10. A combination lock has 3 digit spots, each digit ranges from 0 to 9. a. How many possible combinations can we have? (the same digit can be shown in more than one spot) b. How many possible combinations are possible if a digit can be used only once? c. What is the probability of having number 1 in spot 1, number 2 in spot 2 and number 3 in spot 3? ( the same digit can be shown in more than one spot in this case).

How many possible outcomes would there be if three coins were tossed once?

The access code for a garage door consists of three digits. Each digit can be any number from 1 through 7, and each digit can be repeated. Complete parts (a) through (c). (a) Find the number of possible access codes. (b) What is the probability of randomly selecting the correct access code on the first try? (c) What is the probability of not selecting the correct access code on the first try?

7. There are four tickets in a box, numbered from 1 to 4. We draw two without replacement. What is the probability of getting a "1" and a "“2" (in no particular order).