# Aptitude | Probability | Question 5

An urn contains 12 red and 18 white marbles. Two marbles are drawn without replacement one after another. What is the probability that first is red and second is white?

**(A)** 16/145**(B)** 9/32**(C)** 36/145**(D)** 5/32**Answer:** **(C)****Explanation:** Two marbles are drawn without replacement one after another, then the probability that first is red and second is white,

= (12/30)*(18/29) = (2/5)*(18/29) = (2*18) / (5*29) = 36 / 145

So, option (C) is correct.

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