Question
A bag contains 12 white and some black balls. If the probability of drawing a black ball from the bag is thrice that of drawing a white ball, find the number of black balls in the bag.
More Probability Questions
- A box contains 5 blue jellies, some red jelly and rest yellow jelly. The probability of picking a red ball at random is 3/10, while the probability of pick...
- A box contains 5 red balls, 3 blue balls and 2 green balls. Two balls are drawn at random without replacement. What is the probability that both balls are ...
- 40 know Hindi, 32 know English, 18 know both. One student chosen. Probability they know at least one?
- The probability of selecting a rotten egg randomly from a basket of 1000 eggs is 0.16. What is the number of rotten eggs in the basket?
- The probability of selecting a rotten apple randomly from a heap of 1050 apples is 0.36. What is the number of rotten apples in the heap?
- A bag contains 13 white and some black balls. If the probability of drawing a black ball from the bag is twice that of drawing a white ball, find the numbe...
- If a coin is tossed 10 times then what is the probability of getting three heads?
- Out of 36 balls in a bag, some are black and the rest are white in the ratio 7:5. Two balls are drawn randomly without putting back the first one. What is ...
- A bag contains 3 black and 9 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
- Two cards are drawn together from a pack of 52 cards. The probability that one is a club and one is a diamond?
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)