PYQ Vault
EbooksTutor

Day 24: NDA Maths

5 questions. Try each one first, then open its answer.

  1. Question 1

    Lines. This type asked 3 times: NDA 1 2020, NDA 1 2021, NDA 2 2026. This one: NDA 2 2026

    58
    ABCDABCD is a square. The equations of ABAB, ADAD and BDBD are y=0y = 0, x=0x = 0 and x+y−4=0x + y - 4 = 0 respectively. What is the equation of ACAC?

    Tap an option to check your answer.

  2. Question 2

    Matrices & Determinants. This type asked 3 times: NDA 2 2018, NDA 1 2022, NDA 2 2026. This one: NDA 2 2026

    17
    If AA is a square matrix of order 3 such that A(adjA)=[640006400064]A(\text{adj} A) = \begin{bmatrix} 64 & 0 & 0 \\ 0 & 64 & 0 \\ 0 & 0 & 64 \end{bmatrix} then what is ∣A∣|A| equal to?

    Tap an option to check your answer.

  3. Question 3

    Probability. This type asked 3 times: NDA 1 2021, NDA 2 2021, NDA 2 2026. This one: NDA 2 2026

    112
    Consider the following statements for three events AA, BB and CC : I. P(A∩B∩C)≤P(A)+P(B)+P(C)−2P(A \cap B \cap C) \le P(A) + P(B) + P(C) - 2 II. P(A∪B∪C)≥P(A)+P(B)+P(C)P(A \cup B \cup C) \ge P(A) + P(B) + P(C) Which of the statements given above is/are correct?

    Tap an option to check your answer.

  4. Question 4

    Sets & Relations. This type asked 3 times: NDA 1 2020, NDA 1 2024, NDA 2 2026. This one: NDA 2 2026

    23
    Let SS be the set of all real numbers and RR be a relation on SS defined by xRy⇒∣x∣≤yxRy \Rightarrow |x| \le y. Then RR is

    Tap an option to check your answer.

  5. Question 5

    Sets & Relations. This type asked 3 times: NDA 1 2018, NDA 2 2019, NDA 2 2026. This one: NDA 2 2026

    47
    A research group conducted a survey of 500 consumers and reported that 370 consumers preferred product XX and 240 consumers preferred product YY. What is the least number that must have preferred both the products?

    Tap an option to check your answer.