Probabilities of "at least one"'s happening. If you show your work I will be happy with answers that are either fractions or decimals.

1. Suppose I roll four 10-sided dice.

a. What is the probability that I roll at least one 9

b. What is the probability that I get at least one match (that means I get the same number at least twice)

2. I have a bag with 3 red, 3 blue, 3 green and 3 white marbles, and I pick 4 without replacement

a. What is the probability that I get at least one red

b. What is the probability that I get at least two of the same color

3. I have a regular deck of cards, and I draw 3 without replacement

a. What is the probability that I get at least two of a kind (same number or face card)

b. What is the probability that I get at least one Jack

The first step is to match each of these with it's opposite (or complement) See the next step here