10573 cars can leave out of 6 cars in 6C3 ways....
if both the cars on either side leave.....the third car can leave in 4 ways....
so probability=46C3=15
Shan parks his car among 6 cars already standing in a row, his car not being parked at an end. On return he finds that exactly 4 of the 7 cars are still there. What is the probability that both the cars parked on two sides of his car, have left?
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1 Answers
1057