101k views
2 votes
In a bag there are 4 blue marbles,8 red marbles, and 5 orange marbles. if two marbles are drawn without replacement find the probability that both marbles are the same color, the second marble being red. the first being blue the second being orange

User Dave Clark
by
8.1k points

1 Answer

2 votes
P( both same colour) = P(both blue) + P(both red) + P(both orange)

= 4/17 * 3/16 + 8/17 * 7/16 + 5/17 * 4/16 = 3/68 + 7/34 + 5/68 = 11/34 Answer

P( second marble being red) = P(first marble not being red) * P( second being red)

= 9/17 * 8/16 = 9/17 * 1/2 = 9/34 answer

P(first ble and second orange) = 4/17 * 5/16 = 5/68 answer






User Damorin
by
8.5k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories