A bag contains 5 red marbles, 9 white marbles, and 5 blue marbles. You draw 3 marbles out at random, without replacement. What is the probability that all the marbles are red? The probability that all the marbles are red is . What is the probability that exactly two of the marbles are red? The probability that exactly two of the marbles are red is . What is the probability that none of the marbles are red? The probability of picking no red marbles is
A bag contains 5 red marbles, 9 white marbles, and 5 blue marbles. You draw 3 marbles out at random, without replacement. What is the
The probability that all the marbles are red is .
What is the probability that exactly two of the marbles are red?
The probability that exactly two of the marbles are red is .
What is the probability that none of the marbles are red?
The probability of picking no red marbles is
The formula for combination is nCr = n! / [r! (n – r)!] = [n (n – 1) … (n – r + 1)]/r!.
Explanation:
Consider that r distinct items need to be selected from n items and the selection must be without replacement. The order of selection does not matter.
In such case, the combination formula can be applied.
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