NDA questions
2295 published questions with worked solutions.
- How many three-digit even numbers can be formed using the digits 1, 2, 3, 4 and 5 when repetition of digits is **not** allowed?
- The angle of elevation of a tower of height h from a point A due South of it is x and from a point B due East of A is y. If AB=z,...
- If A and B are two events such that P(A)=0 5, P(B)=0 6 and P(A B)=0 4, then what is P( A B ) equal to?
- A problem is given to three students A, B and C whose probabilities of solving the problem are 1 2 , 3 4 and 1 4 respectively....
- A pair of fair dice is rolled. What is the probability that the second dice lands on a higher value than does the first?
- A fair coin is tossed and an unbiased dice is rolled together. What is the probability of getting a 2 or 4 or 6 along with head?
- If A, B, C are three events, then what is the probability that at least two of these events occur together?
- Two independent events A and B are such that P(A B)= 2 3 and P(A B)= 1 6 . If P(B)<P(A), then what is P(B) equal to?
- If two fair dice are rolled then what is the conditional probability that the first dice lands on 6 given that the sum of numbers...
- There are n socks in a drawer, of which 3 socks are red. If 2 of the socks are chosen randomly and the probability that both...
- In eight throws of a die, 5 or 6 is considered a success. The mean and standard deviation of total number of successes is...
- A and B are two events such that A and B are mutually exclusive. If P(A)=0 5 and P(B)=0 6, then what is the value of P(A B)?
- Consider the following statements : 1. The algebraic sum of deviations of a set of values from their arithmetic mean is always...
- If all the natural numbers between 1 and 20 are multiplied by 3, then what is the variance of the resulting series?
- What is the probability that an interior point in a circle is closer to the centre than to the circumference?
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