SOLUTION: An envelope contains 12 cards numbered 1 to 12. Is a card picked randomly from the envelope, what is the probability that it is an odd number or a composite number?
Algebra ->
Probability-and-statistics
-> SOLUTION: An envelope contains 12 cards numbered 1 to 12. Is a card picked randomly from the envelope, what is the probability that it is an odd number or a composite number?
Log On
Question 1179177: An envelope contains 12 cards numbered 1 to 12. Is a card picked randomly from the envelope, what is the probability that it is an odd number or a composite number? Answer by ikleyn(52921) (Show Source):
There are 12 possible outcomes, in all.
Of them, if the number is not odd, then, it is even.
Of even numbers, all are composed, except of prime even number 2.
Therefore, the answer is P = = .
