An unbiased cubic die is thrown.What is the probabiltiy of getting a multiple of 3 or 4?
A). 1/12
B). 1/9
C). 3/4
D). 1/2
1/2
NA
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1. A bag contains 3 red, 4 white and 7 black balls. The probability of drawing a red or a black ball, is
2. Three fair coins are tossed simultaneously. Find the probability of getting one head.
3. What is the probability that when a fair coin is tossed 2 times then at least one of them are heads?
4. Three cards are drawn successively, without replacement from a pack of 52 well shuffled cards.What is the probability that first two cards are queens and the third card drawn is an ace?
5. A basket consists of 40 red ball and 20 white ball of which 8 red ball and 2 white ball are damaged. If Amit pick 2 balls at random. What is the probability that either both are red balls or undamaged balls?
6. A man and his wife appear in an interview for two vacancies in the same post. The probability of husband's selection is (1/7) and the probability of wife's selection is (1/5). What is the probability
7. The variance of binomial distribution is always
8. The probability of occurrence of an event A is 5/9 . The probability of non-occurrence of the event B is 5/11. The probability that at least one of them will occur ?
9. The letters of the word ‘PROBABILITY’ are arranged in all possible ways. The chance that two B’s and also two I’s occur together is
10. There are four machine and it is know that exactly two of them are faulty, They are tested. One by one in a random order till both the faulty machines are identified. Then the probability that only tw
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