Skip to main content
OlympiadHQ

Browse · MATH

Print

jmc

counting and probability junior

Problem

A bag has 3 red marbles and 5 white marbles. Two marbles are drawn from the bag and not replaced. What is the probability that the first marble is red and the second marble is white?
Solution
The probability that the first is red is . Now with 7 remaining, the probability that the second is white is . The answer is .
Final answer
\dfrac{15}{56}