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Question 1 of 10
1. Question
If two coins are tossed five times, then the probability of getting 5 heads and 5 tails is
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Question 2 of 10
2. Question
A six faced dice is so biased that it is twice as likely to show an even number as an odd number when thrown. If it is thrown twice the probability that the sum of two numbers thrown is even, is
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Question 3 of 10
3. Question
An unbiased coin is tossed n times. Let X denote the number of times head occurs. If P (X = 4), P (X = 5) and P (X= 6) are in AP, then the value of n can be
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Question 4 of 10
4. Question
The probability that an event A happens in one trial of an experiment is 0.4. Three independent trials of the experiment are formed. The probability that the event A happens atleast once is
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Question 5 of 10
5. Question
The probability that a marksman will hit a target is given as 1/5. Then, the probability that at least one hit in 10 shots is
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Question 6 of 10
6. Question
A carton contains 20 bulbs, 5 of which are defective. The probability that, if a sample of 3 bulbs is chosen at random from the carton, 2 will be defective, is
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Question 7 of 10
7. Question
If X follows a binomial distribution with parameters n = 8 and p =1/2, then P (|X – 4| ≤ 2)
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Question 8 of 10
8. Question
The mean and variance of a binomial variable X are 2 and 1 respectively. The probability that X takes values greater than 1, is
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Question 9 of 10
9. Question
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Question 10 of 10
10. Question
For a binomial variate X with n = 6, if P(X = 2) = 9P(X = 4), then its variance is
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