Question
A bag contains 20 white and some black balls. If the probability of drawing a black ball from the bag is 6.25 times that of drawing a white ball, find the number of black balls in the bag.
More Probability Questions
- Three persons i.e. ‘D’, ‘E’ and ‘F’, are given the same puzzle to solve. The probability that ‘D’, ‘E’ and ‘F’ will solve the puzzle is (5/8), (2/3) and (3...
- A game consists of tossing three coins once and then rolling two dice. Find the probability of getting exactly one tail in the coin toss and a sum equal to...
- A bag contains 15 black balls, 25 white balls, and 20 yellow balls. If three balls are drawn at random with replacement, what is the probability of drawing...
- The probability of selecting a rotten egg randomly from a basket of 600 eggs is 0.14. What is the number of rotten eggs in the basket?
- Tokens numbered 1 to 350 are in a bag. What is the probability that the Token drawn has a number which is a multiple of 6 or 7?
- Two players, A and B, play a tennis match. It is known that the probability of A winning the match is 0.65. What is the probability of B winning the match?
- A box contains only three colors of balls- red, green, and blue. What is the minimum number of balls that should be picked from the box to ensure that at l...
- A is trying to break a bulb by throwing balls at it. If he hits the bulb 3 times in every 5 throws and bulb breaks 3 times out of 12 hits, then find the pr...
- Determine the probability of drawing a number card (2 to 10) from a standard 52-card deck.
- A company wants to pack 144 small boxes, 216 medium boxes, and 288 large boxes into cartons such that each carton contains the same number of boxes of each...
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)