Probability · Question 28 · Hard
Probability question 28
Bag I contains 3 red and 2 blue balls; Bag II contains 2 red and 4 blue balls. A bag is chosen at random and a ball is drawn from it. What is the probability that the ball is red?
- 5/11
- 7/15
- 1/2
- 5/16
Answer and explanation
Answer: B. 7/15
Explanation: P(red) = (1/2)(3/5) + (1/2)(2/6) = 3/10 + 1/6 = 14/30 = 7/15.
Previous: A committee of 3 is chosen at random from 5 men and 4 women. What is the… · Next: A factory in Pune has two machines. Machine A makes 60% of the bolts, of which…
Practise probability
Try a fresh set of probability questions with an explanation after every answer, free and without signing up: Probability practice. Or sit a full placement mock test.
More probability questions
- A number is chosen at random from 1 to 100. What is the probability that it is…
- A fair coin is tossed 5 times. What is the probability of getting exactly 3…
- A committee of 3 is chosen at random from 5 men and 4 women. What is the…
- A factory in Pune has two machines. Machine A makes 60% of the bolts, of which…
- Four letters are placed at random into four envelopes addressed to their four…
More quantitative aptitude practice
Data Interpretation · Mensuration · Algebra & Equations · Number System · HCF & LCM · Simplification · Percentages · Profit & Loss
LogicWiz Exams home · All practice topics · Placement mock tests · Daily 10 challenge