NDA questions
2295 published questions with worked solutions.
- In an entrance test there are multiple choice questions. There are four options for each question, of which only one is correct....
- Consider the following statements in respect of the events A, B, C : I. (A B C) ( A B C ) is an impossible event. II. (A B C) ( A...
- The standard deviation of 100 observations is 10. If 5 is multiplied to each of the observations, then what is the new standard...
- For a Binomial distribution with mean 6 and standard deviation 2 , what is the value of P(X=0)?
- If the random variable X has mean 3 and standard deviation 5, then what is the variance of the random variable Y=2X-5?
- Three events A, B and C are such that A and B are disjoint, A and C are independent, B and C are independent. If 4P(A)=2P(B)=P(C)...
- What is 6 ( /18)-8 ^3( /18) equal to?
- How many values of satisfy the equation ^2 + ^2 =2, where 0^ < <360^ ?
- What is ( ^ -1 0 75) equal to?
- What is ^2 ( 1 2 ^ -1 1 3 ) equal to?
- What is (1125^ ) (405^ )+ (765^ ) (675^ ) equal to?
- If A is a square matrix of order 3 and |A|=2, then what is adj ( adj A) equal to?
- If A is a square matrix of order 3 such that A( adj A)= bmatrix 64&0&0 0&64&0 0&0&64 bmatrix then what is |A| equal to?
- Let A= bmatrix &- & bmatrix What is the least value of for which A+A^T=I, where I is the identity matrix of order 2?
- Let A, B and C be the square matrices of order 2 such that AB=AC. Which of the statements given below is/are correct? I. B and C...
- If A is a square matrix of order 3 and |A|=4, then what is | adj A| equal to?
- Let A and B be symmetric matrices of the same order. Which of the following statements is/are correct? I. (AB-BA) is also a...
- If A= bmatrix -1&2 3&-4 bmatrix , then what is |A^ -1 | equal to?
- Let S be the set of all real numbers and R be a relation on S defined by xRy |x| y. Then R is
- 4-digit numbers are formed with 1, 2, 3 and 4. What is the number of the 4-digit numbers in which at least one digit is repeated?