NDA questions
2827 published questions with worked solutions.
- If two random variables X and Y are connected by relation 2X-3Y 5X+4Y =4 and X follows Binomial distribution with parameters n=10...
- If a, b, c are in HP, then what is 1 b-a + 1 b-c equal to? 1. 2 b 2. 1 a + 1 c 3. 1 2 ( 1 a + 1 b + 1 c ) Select the correct...
- An edible oil is sold at the rates 150, 200, 250, 300 rupees per litre in four consecutive years. Assuming that an equal amount...
- If the letters of the word "TIRUPATI" are written down at random, then what is the probability that both Ts are always...
- Let m=77^n. The index n is given a positive integral value at random. What is the probability that the value of m will have 1 in...
- Three different numbers are selected at random from the first 15 natural numbers. What is the probability that the product of two...
- Let X be a matrix of order 3 3, Y be a matrix of order 2 3 and Z be a matrix of order 3 2. Which of the following statements are...
- Consider the following statements : I. The set of all irrational numbers between 12 and 15 is an infinite set. II. The set of all...
- How many 4-digit numbers are there having all digits as odd?
- Let A and B be two square matrices of same order. If AB is a null matrix, then which one of the following is correct?
- In the expansion of (1+x)^p(1+x)^q, if the coefficient of x^3 is 35, then what is the value of (p+q)?
- If p times the pth term of an AP is equal to q times the qth term (p q), then what is the (p+q)th term equal to?
- Let p= (x), q= (x^3) and r= (x^5), where x>1. Which of the following statements is/are correct? I. p, q and r are in AP. II. p, q...
- If Z= 1 3 vmatrix i&2i&1 2i&3i&2 3&1&3 vmatrix =x+iy; i= -1 then what is modulus of Z equal to?
- What is the value of the sum _ n=1 ^ 20 (i^ n-1 +i^n+i^ n+1 ) where i= -1 ?
- Let x>1, y>1, z>1 be in GP. Then 1 1+ x , 1 1+ y , 1 1+ z are
- If =- 1 2 +i 3 2 then what is vmatrix 1+ &1+ ^2& + ^2 1& & ^2 1 & 1 ^2 &1 vmatrix equal to?
- If the sum of the first n terms of a series is n(2n+1), then what is the nth term?
- In how many ways can the letters of the word INDIA be permutated such that in each combination, vowels should occupy odd...
- The letters of the word EQUATION are arranged in such a way that all vowels as well as consonants are together. How many such...