Question 1200325
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A statistics textbook chapter contains 60 exercises, 6 of which are essay questions. 
A student is assigned 10 problems. What is the probability that at least one is essay?
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The probability that no one is an essay is


    P = {{{(54/60)*(53/59)*(52/58)*(51/57)*(50/56)*(49/55)*(48/54)*(47/53)*(46/52)*(45/51)}}} = 0.3174  (rounded).


The probability that at least one is an essay is the complement to it

    P' = 1 - 0.3174 = 0.6826  (rounded).  <U>ANSWER</U>
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Solved.


The long formula is SELF-EXPLANATORY: its meaning is clear from its structure.