Question 1191431
12C4 number of ways to pick 4 from 12
for a dictionary, the numerator is 11C3*1C1
The probability is 165/495 or 1/3
another way is probability= 1- not a dictionary, which is  1-(11/12)(10/11)(9/10)(8/9)=1-(8/12)=1/3
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the numerator is 6C1*5C3=60, so the probability is 60/495=12/95