NDA questions
2827 published questions with worked solutions.
- Consider the following relations for two events E and F : 1. P(E F) P(E)+P(F)-1 2. P(E F)=P(E)+P(F)+P(E F) 3. P(E F) P(E)+P(F)...
- If P(A B)<P(A), then which one of the following is correct?
- When the measure of central tendency is available in the form of mean, which one of the following is the most reliable and...
- In a cricket match, a batsman hits a six 8 times out of 60 balls he plays. What is the probability that on a ball played he does...
- What is the mean of natural numbers contained in the interval [15, 64]?
- For the set of numbers x, x, x+2, x+3, x+10 where x is a natural number, which of the following is/are correct? 1. Mean > Mode 2....
- If g is the geometric mean of 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, then which one of the following is correct?
- If the harmonic mean of 60 and x is 48, then what is the value of x?
- What is the mean deviation of first 10 even natural numbers?
- If _ i=1 ^ 10 x_i=110 and _ i=1 ^ 10 x_i^2=1540 then what is the variance?
- 3-digit numbers are formed using the digits 1, 3, 7 without repetition of digits. A number is randomly selected. What is the...
- What is the probability that the roots of the equation x^2+x+n=0 are real, where n N and n<4?
- If A and B are two events such that P( not A)= 7 10 , P( not B)= 3 10 and P(A B)= 3 14 , then what is P(B A) equal to?
- Seven white balls and three black balls are randomly placed in a row. What is the probability that no two black balls are placed...
- Suppose X= 1, 2, 3, 4 and R is a relation on X. If R= (1, 1), (2, 2), (3, 3), (1, 2), (2, 1), (2, 3), (3, 2) , then which one of...
- A relation R is defined on the set N of natural numbers as xRy x^2-4xy+3y^2=0. Then which one of the following is correct?
- If A= x Z : x^3-1=0 and B= x Z : x^2+x+1=0 , where Z is set of complex numbers, then what is A B equal to?
- Consider the following statements for the two non-empty sets A and B : 1. (A B) (A B ) ( A B)=A B 2. (A ( A B ))=A B Which of the...
- Let X be a non-empty set and let A, B, C be subsets of X. Consider the following statements : 1. A C (A B) (C B), (A B) (C B) 2....
- If B= bmatrix 3 & 2 & 0 2 & 4 & 0 1 & 1 & 0 bmatrix , then what is adjoint of B equal to?