Finding the probability from a given situation.

In a certain college, 33% of the physics majors belong to ethnic minorities. Find the probability of the event that, from a random sample of 10 students who are physics majors, 2 or less belong to an ethnic minority.

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... equal to the probability that each of the ten chosen is not a minority

(.67)^10 = 0.0182284

The probability that 1 is a minority is computed ...