NDA questions
2204 published questions with worked solutions.
- The mean of a group of 100 observations was found to be 20. Later it was found that four observations were incorrect, which were...
- A committee of two persons is constituted from two men and two women. What is the probability that the committee will have only...
- A question is given to three students A, B and C whose chances of solving it are 1 2 , 1 3 and 1 4 respectively. What is the...
- The mean weight of 150 students in a certain class is 60 kg. The mean weight of boys in the class is 70 kg and that of girls is...
- For two dependent events A and B, it is given that P(A)=0 2 and P(B)=0 5. If A B, then the values of conditional probabilities...
- A point is chosen at random inside a circle. What is the probability that the point is closer to the centre of the circle than to...
- Consider the following statements : Statement 1 : Range is not a good measure of dispersion. Statement 2 : Range is highly...
- A card is drawn from a well-shuffled ordinary deck of 52 cards. What is the probability that it is an ace?
- If the data are moderately non-symmetrical, then which one of the following empirical relationships is correct?
- For given statistical data, the graphs for less than ogive and more than ogive are drawn. If the point at which the two curves...
- Consider the following statements : 1. Two events are mutually exclusive if the occurrence of one event prevents the occurrence...
- A sample of 5 observations has mean 32 and median 33. Later it is found that an observation was recorded incorrectly as 40...
- If two fair dice are thrown, then what is the probability that the sum is neither 8 nor 9?
- Let A and B are two mutually exclusive events with P(A)= 1 3 and P(B)= 1 4 . What is the value of P( A B )?
- The mean and standard deviation of a binomial distribution are 12 and 2 respectively. What is the number of trials?
- If x+ _ 10 (1+2^x)=x _ 10 5+ _ 10 6 then x is equal to
- The matrix A has x rows and x+5 columns. The matrix B has y rows and 11-y columns. Both AB and BA exist. What are the values of x...
- If S_n=nP+ n(n-1)Q 2 , where S_n denotes the sum of the first n terms of an AP, then the common difference is
- The roots of the equation (q-r)x^2+(r-p)x+(p-q)=0 are
- If E is the universal set and A=B C, then the set E-(E-(E-(E-(E-A)))) is same as the set