An urn contains three red R balls numbered 1, 2 and 3, four white W balls numbered 4, 5, 6 and 7, and three black B balls numbered 8, 9 and 10. A ball is drawn from the urn. What is the probability that it is red?
A) P(
R) =
B) P(
R) =
C) P(
R) =
D) P(
R) =
E) P(
R) =

Question

An urn contains three red R balls numbered 1, 2 and 3, four white W balls numbered 4, 5, 6 and 7, and three black B balls numbered 8, 9 and 10. A ball is drawn from the urn. What is the probability that it is red? ​
A) P(
R) = 
B) P(
R) = 
C) P(
R) = 
D) P(
R) = 
E) P(
R) =

Quizplus · Accepted Answer

There are a total of 10 balls in the urn. Out of those 10, there are 3 red balls. Therefore, the probability of drawing a red ball is P(R) = 3/10. Option B is the only choice that matches this probability value.

An Urn Contains Three Red R Balls Numbered 1, 2