Question
36 pens are there in a box where 12 are red pens, ‘p’ are blue pens and remaining are black pens. If a pen is picked, the probability of getting blue pen is 0.25. Find the ratio of the number of blue pens and black pens.
More Probability Questions
- 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?
- A bag contains 4 white balls, 5pink balls and 3 black balls. 2 balls are drawn randomly. What is the probability that there are no black balls?
- There are 30 cars standing in a parking lot which consist of silver, grey and white cars. The number of grey and white cars are equal, and the number of si...
- 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...
- Find the probability of selecting a number card (2 to 10) from a deck of well shuffled cards.
- 30 defective earphones got mixed with 150 non-defective earphones. A student randomly picks one earphone. Find the probability that it is defective.
- 15 rotten bananas are accidentally mixed with 115 good ones. It is not possible to just look at a banana and tell whether or not it is rotten. One banana i...
- A box contains 8 green balls, 6 blue balls and 6 yellow balls. Two balls are drawn at random. What is the probability that at least one of them is yellow?
- A bag contains 8 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 number...
- Out of three girls and five boys, five children are to be randomly selected for a dance programme. What is the probability that all the selected children a...
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)