Question
A bag contains 5 black balls,“a” white balls and “b” purple balls. If one ball taken out from the bag, then probability of being it white is 2/7, while the probability of being purple is 5/14. The sum between number of white and purple balls in that bag is?
More Probability Questions
- A committee of 4 members is to be formed from 5 men and 3 women. What is the probability that the committee will have exactly 2 women?
- A piggy bank has seven 25 paise coins, five Rs. 2 coins, and thirteen Rs. 5 coins. One of the coins fell and got lost. Find the probability that the lost c...
- A box contains 6 red, 4 blue, 2 green and 4 yellow pens. If four pens are picked at random, what is the probability that one is green, two are blue and one...
- 20 defective LED bulbs were mixed with 180 working LED bulbs. One bulb is selected randomly. What is the probability that the selected bulb is defective?
- A bag contains 6 purple balls, 9 yellow balls and 5 green balls. Three balls are drawn at random. Find the probability that at least two balls are yellow.
- The probability that Neha passes the exam is (3/7) and the probability that Arjun fails the exam is (4/9). If both give the exam, find the probability that...
- The probability that Rohan fails in Physics is (1/3), and the probability that he does not fail in Chemistry is (3/4). Find the probability that he fails e...
- A box contains 5 red balls and 3 blue balls. Two balls are drawn at random without replacement. Find the probability that both balls are of the same colour...
- A bag contains 16 black and 18 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
- Bag I contains 5 red, 4 blue and 3 green balls. Bag II contains 4 red, 5 blue and 3 green balls. A fair die is thrown once. If the outcome is a prime numbe...
Relevant for Exams:
Hey! Ask a query
Please enter email id
The email must be a valid email address.
Please enter Mobile Number
Please enter valid Mobile Number
Please enter your Doubt
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
- 200 Questions with Detailed Solutions
- Section-wise Coverage (GA, English, Quant & Reasoning)