NDA questions
2295 published questions with worked solutions.
- 8 coins are tossed simultaneously. The probability of getting at least 6 heads is
- Three groups of children contain 3 girls and 1 boy; 2 girls and 2 boys; 1 girl and 3 boys. One child is selected at random from...
- Consider the following statements : 1. If 10 is added to each entry on a list, then the average increases by 10. 2. If 10 is...
- The variance of 25 observations is 4. If 2 is added to each observation, then the new variance of the resulting observations is
- If x_i>0, y_i>0 (i=1, 2, 3, n) are the values of two variables X and Y with geometric means P and Q respectively, then the...
- If the probability of simultaneous occurrence of two events A and B is p and the probability that exactly one of A, B occurs is...
- Two integers x and y are chosen with replacement from the set 0, 1, 2, , 10 . The probability that |x-y|>5 is
- Three dice having digits 1, 2, 3, 4, 5 and 6 on their faces are marked I, II and III and rolled. Let x, y and z represent the...
- Which one of the following can be obtained from an ogive?
- In any discrete series (when all values are not same), if x represents mean deviation about mean and y represents standard...
- If both p and q belong to the set 1, 2, 3, 4 , then how many equations of the form px^2+qx+1=0 will have real roots?
- If A, B and C are subsets of a given set, then which one of the following relations is **not** correct?
- If the sum of first n terms of a series is (n+12), then what is its third term?
- What is the value of k for which the sum of the squares of the roots of 2x^2-2(k-2)x-(k+1)=0 is minimum?
- If the roots of the equation a(b-c)x^2+b(c-a)x+c(a-b)=0 are equal, then which one of the following is correct?
- If |x^2-3x+2|>x^2-3x+2, then which one of the following is correct?
- A geometric progression (GP) consists of 200 terms. If the sum of odd terms of the GP is m, and the sum of even terms of the GP...
- If a set A contains 3 elements and another set B contains 6 elements, then what is the minimum number of elements that (A B) can...
- What is the value of the determinant vmatrix 1!&2!&3! 2!&3!&4! 3!&4!&5! vmatrix ?
- What are the values of x that satisfy the equation vmatrix x&0&2 2x&2&1 1&1&1 vmatrix + vmatrix 3x&0&2 ^2&2&1 0&1&1 vmatrix =0?