A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective is
A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective is
A). 4/19
B). 5/19
C). 6/19
D). 7/19
1 answers
Other Questions
1. The probability function is always
2. Given below are two quantities named A and B. Based on the given information, you have to determine relation between the two quantities. You should use the given data and knowledge of Mathematics to choose between the possible answers.
There are two bags. First bag contains 4 red and 7 blue balls.
3. The odds against Sushant solving a certain problem is 5 to 2 and odds in favour of Rahul solving the same problem are 7 to 5. What is the probability that the problem will be solved?
4. A listing of the possibile outcomes of an experiment and their corresponding probability is called
5. Two dice are thrown simultaneously. What is the probability of getting a number other than 4 on any dice ?
6. Probability distribution of a random variable is also known as
7. In a race, the odd favour of cars P,Q,R,S are 1:3, 1:4, 1:5 and 1:6 respectively. Find the probability that one of them wins the race.
8. In a throw of dice what is the probability of getting number greater than 5
9. A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is:
10. A bag contains 7 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is -.
