There are 6 blue marbles, 3 red marbles, and 5 yellow marbles in a bag. What is the probability of selecting a blue or red marble on the first draw?
What is 9/14
A card is chosen at random from a standard deck. What is the probability of choosing an ace.
What is 4/52
A jar contains 15 pennies, 28 nickels, 12 dimes, and 20 quarters.
P(quarter | not a penny)
What is 20/60
A month of the year is chosen at random. What is the probability that the month has exactly 30 days, given that it is no later than August?
What is 2/8
Determine if it is permutation or combination and set it up in the formula. There are 18 baseball teams in a league. How many ways can the league choose two teams to play each other on opening night?
What is combination and 18!/2!(18-2)!