A draw from an urn
Open answerAn urn holds 12 balls: 5 red and 7 black. Three are drawn simultaneously. Compute the probability of getting exactly 2 red ones, then that of getting at least one red. Explain your method.
An urn holds 12 balls: 5 red and 7 black. Three are drawn simultaneously. Compute the probability of getting exactly 2 red ones, then that of getting at least one red. Explain your method.