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A box contains 50 balls numbered from 1 to 50. If 6 balls are drawn with replacement, what is the probability that at least two of them have the same number?

In how many ways can u arrange five things

If the letters in the word POKER are rearranged, what is the probability that the word will begin with the letter K and end with the letter P?

can u help me?

Two cards are drawn from a regular deck of 52 cards, without replacement. What is the probability that the first card is an ace of clubs and the second is black?

any one know the answer?