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Day 317: NDA Maths

5 questions (6 parts). Try each one first, then open its answer.

  1. Question 1

    Probability. Asked once: NDA 2 2024

    105
    A die has two faces with number 4, three faces with number 5 and one face with number 6. If the die is rolled once, then what is the probability of getting 4 or 5?

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  2. Question 2

    Properties of Triangle. Asked once: NDA 1 2021

    34
    What is the area of the triangle ABCABC with sides a=10a = 10 cm, c=4c = 4 cm and angle B=30°B = 30°?

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  3. Question 3 (case study, 2 parts)

    Quadratic Equations. Asked once: NDA 2 2023

    A quadratic equation is given by (a+b)x2−(a+b+c)x+k=0(a+b)x^2-(a+b+c)x+k=0, where a,b,ca,b,c are real.
    36
    If k=c/2 (c≠0)k=c/2\ (c\neq0), then the roots of the equation are:

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    37
    If k=ck=c, then the roots of the equation are:

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  4. Question 4

    Sequence & Series. Asked once: NDA 2 2021

    5
    If p=(1111⋯ up to n digits)p = (1111\cdots\text{ up to }n\text{ digits}), then what is the value of 9p2+p9p^{2}+p?

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  5. Question 5

    Statistics. Asked once: NDA 2 2021

    103
    When the measure of central tendency is available in the form of mean, which one of the following is the most reliable and accurate measure of variability?

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