CBSE Class 10 Maths (Basic) 2025 · Paper 430(B)/S · Question 18
A bag contains balls out of which some are red, some are blue and the remaining are black. If the probability of drawing a red ball from the bag is and that of blue ball is , then the number of black balls in the bag are:
- (a)
- (b)
- (c)
- (d)
Answer
(d)
🔒 Step-by-step solution
Sign up free to see every step of how it is worked out.
From the board paper
More questions from Probability
Class 10 Maths — every question with an expert-verified, step-by-step solution.
- Q1 Complete the following statements: (i) Probability of an event E + Pr…
- Q2 Which of the following experiments have equally likely outcomes? E…
- Q3 Why is tossing a coin considered to be a fair way of deciding wh…
- Q4 Which of the following cannot be the probability of an event?
- Q5 If P(E)=0.05, what is the probability of 'not E'?
- Q6 A bag contains lemon flavoured candies only. Malini takes out one…
- Q7 It is given that in a group of 3 students, the probability of 2 st…
- Q8 A bag contains 3 red balls and 5 black balls. A ball is drawn at ra…
- Q9 A box contains 5 red marbles, 8 white marbles and 4 green marbles…
- Q10 A piggy bank contains hundred 50p coins, fifty Rs 1 coins, twenty Rs…
- Q11 Gopi buys a fish from a shop for his aquarium. The shopkeeper takes…
- Q12 A game of chance consists of spinning an arrow which comes to rest…
All 382 questions on Probability → Browse all Maths chapters →