CBSE Class 10 Maths (Basic) 2020 · Paper 430/1/1 · Question 21
A bag contains red balls and some blue balls. If the probability of drawing a blue ball at random from the bag is three times that of a red ball, find the number of blue balls in the bag.
Answer
The bag contains blue balls.
🔒 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 →