Question
A bag contains 25 white and some black balls. If the probability of drawing a black ball from the bag is 1.4 times that of drawing a white ball, find the number of black balls in the bag.
More Probability Questions
- 35 defective headphones got packed with 105 non-defective headphones. A customer randomly chooses one headphone. Find the probability that it is defective.
- 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...
- A box holds 8 green balls, 7 blue balls, and 5 yellow balls. Three balls are picked randomly. What is the probability that at least two balls are blue?
- A bag contains 5 red, 4 blue and 3 green balls. Three balls are drawn at random from the bag one after another without replacement. What is the probability...
- A bag holds 'a' red bands and 5 green bands. If two bands are drawn sequentially at random without replacement, the probability that both selected bands ar...
- A is trying to break a bulb by throwing balls at it. If he hits the bulb 3 times in every 10 throws and bulb breaks 3 times out of 13 hits, then find the p...
- A bag holds 20 balls, each labeled with a unique number that follows a sequence of consecutive multiples of 5, beginning with 5. What is the probability of...
- A bag contains 6 red, 4 green and 5 blue balls. Two balls are drawn at random without replacement. What is the probability that both balls are of different...
- Two cards are drawn at random from a pack of 52 cards. What is the probability that either both are black or both are queens?
- In a box there are 3 pink, 5 black, and 9 yellow flowers. One flower is picked up randomly. What is the probability that it is neither pink nor black?
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)