If you have 7 green, 5 blue, and 6 black marbles in a bag and you choose 1, what is the probability that it is black?

If you have 7 green, 5 blue, and 6 black marbles in a bag and you choose 1, what is the probability that it is white?

If you have 7 green, 5 blue, and 6 black marbles in a bag and you choose 1, what is the probability that it is not green?

From a standard deck of 52 cards, you pick one card. What is the probability that it is a heart?

From a standard deck of 52 cards, you pick one card. What is the probability that it is a 7?

From a standard deck of 52 cards, you pick one card. What is the probability that it is a red face card?

From a standard deck of 52 cards, you will be choosing three cards. What is the probability that all three are black?

From a standard deck of 52 cards, you will be choosing three cards. What is the probability that two are hearts and one is a spade?

From a standard deck of 52 cards, you will be choosing three cards. What is the probability that all two are face cards and one is not?

In a classroom, there are 11 freshmen, 13 sophomores, 8 juniors, and 9 seniors. I want to pick two students. What is the probability that both students are sophomores?