A student is preparing for an exam. Out of 10 problems he can answer 6 problems. If his instructor will select 5 problems from the 10 problems at random, what is the probability that he can answer all problems selected?
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A student is preparing for an exam. Out of 10 problems he can answer 6 problems. If his instructor will select 5 problems from the 10 problems at random, what is the probability that he can answer all problems selected?
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