Question Library
Browse our collection of questions across various subjects
General Ability
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The word ‘Secular’ was inserted into the Constitution of India by:
NDA General Ability 2015
NDA 2015
General Ability
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According to the Geo-scientists, the shape of the earth is: 1. round 2. spherical 3.c lose to that of a…
NDA General Ability 2015
NDA 2015
Mathematics
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What is the probability that the sum of any two different single digit natural numbers is a prime number ?
NDA Mathematics 2015
NDA 2015
Mathematics
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The regression coefficients of a bivariate distribution are –0.64 and –0.36. Then the correlation coefficient of the distribution is
NDA Mathematics 2015
NDA 2015
Mathematics
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A coin is tossed 5 times. The probability that tail appears an odd number of times, is
NDA Mathematics 2015
NDA 2015
Mathematics
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An insurance company insured 2000 scooter drivers, 4000 car drivers and 6000 truck drivers. The probabilities of an accident involving…
NDA Mathematics 2015
NDA 2015
Mathematics
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A problem in statistics is given to three students A, B and C whose chances of solving it independently are…
NDA Mathematics 2015
NDA 2015
Mathematics
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A bag contains 4 white and 2 black balls and another bag contains 3 white and 5 black balls. If…
NDA Mathematics 2015
NDA 2015
Mathematics
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If x ∈ [0, 5], then what is the probability that x² – 3x + 2 ≥ 0 ?
NDA Mathematics 2015
NDA 2015
Mathematics
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An unbiased coin is tossed until the first head appears or until four tosses are completed, whichever happens earlier. Which…
NDA Mathematics 2015
NDA 2015
Mathematics
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The arithmetic mean of 1, 8, 27, 64, … up to n terms is given by
NDA Mathematics 2015
NDA 2015
Mathematics
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The geometric mean of the observations x₁, x₂, x₃, …, xₙ is G₁. The geometric mean of the observations y₁,…
NDA Mathematics 2015
NDA 2015
Mathematics
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A coin is tossed five times. What is the probability that heads are observed more than three times ?
NDA Mathematics 2015
NDA 2015
Mathematics
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Seven unbiased coins are tossed 128 times. In how many throws would you find at least three heads ?
NDA Mathematics 2015
NDA 2015
Mathematics
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If mean and variance of a Binomial variate X are 2 and 1 respectively, then the probability that X takes…
NDA Mathematics 2015
NDA 2015
Mathematics
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Two events A and B are such that P(not B) = 0.8, P(A∪B) = 0.5 and P(A|B) = 0.4. Then…
NDA Mathematics 2015
NDA 2015
Mathematics
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Three digits are chosen at random from 1, 2, 3, 4, 5, 6, 7, 8 and 9 without repeating any…
NDA Mathematics 2015
NDA 2015
Mathematics
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The order and degree of the differential equation of parabolas having vertex at the origin and focus at (a, 0)…
NDA Mathematics 2015
NDA 2015
General Ability
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Which one of the following statements is not correct?
NDA General Ability 2015
NDA 2015