Story problem Probability

Question

A bicycle-rental shop has ten bicycles for rent. On an average day, 60% of the bicycles are rented out. To the nearest whole percent, what is the probability that on one day, only four of ten bicycles are rented out?

Answer 1

₁₀C₄ * (.6)⁴(.4)⁶ = 0.1115 = 11 %

 

 

This is actually a "success" probability problem. In simpler way of explanation: First get the number of ways of getting four out of 10 bicycles. Multiply it to the probability of "success" raised to the number of "successes" you want. Then multiply it to the probability of "failure" raised to the number of "failures".