Question Library
Browse our collection of questions across various subjects
Mathematics
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Consider the following statements : 1.Mean is independent of change in scale and change in origin. 2.Variance is independent of…
NDA Mathematics 2018
NDA 2018
Mathematics
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If 4x – 5y + 33 = 0 and 20x – 9y = 107 are two lines of regression, then…
NDA Mathematics 2018
NDA 2018
Mathematics
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Consider the following statements : 1.If the correlation coefficient rₓᵧ = 0, then the two lines of regression are parallel…
NDA Mathematics 2018
NDA 2018
Mathematics
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Let x̄ be the mean of x₁, x₂, x₃,…, xₙ. If xᵢ = a + c yᵢ for some constants…
NDA Mathematics 2018
NDA 2018
Mathematics
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The probabilities that a student will solve Question A and Question B are 0.4 and 0.5 respectively. What is the…
NDA Mathematics 2018
NDA 2018
Mathematics
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If the correlation coefficient between x and y is 0.6, covariance is 27 and variance of y is 25, then…
NDA Mathematics 2018
NDA 2018
Mathematics
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Consider the following statements: 1.P(A ∪ B) = P(A) + P(B) – P(A ∩ B) 2.P(A ∩ B) = P(B)…
NDA Mathematics 2018
NDA 2018
Mathematics
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In a Binomial distribution, the mean is three times its variance. What is the probability of exactly 3 successes out…
NDA Mathematics 2018
NDA 2018
Mathematics
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What are the order and degree, respectively, of the differential equation (d³y/dx³)² = y⁴ + (dy/dx)⁶ ?
NDA Mathematics 2018
NDA 2018
Mathematics
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The mean weight of 150 students in a certain class is 60 kg. The mean weight of boys is 70…
NDA Mathematics 2019
NDA 2019
Mathematics
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A car travels first 60 km at a speed of 3v km/hr and travels next 60 km at 2v km/hr.…
NDA Mathematics 2019
NDA 2019
Mathematics
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If V is the variance and M is the mean of first 15 natural numbers, then what is V +…
NDA Mathematics 2019
NDA 2019
Mathematics
Easy
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If the range of a set of observations on a variable X is known to be 25 and if Y…
NDA Mathematics 2019
NDA 2019
Mathematics
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Mean of 100 observations is 50 and standard deviation is 10. If 5 is added to each observation, then what…
NDA Mathematics 2019
NDA 2019
Mathematics
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If a fair die is rolled 4 times, then what is the probability that there are exactly 2 sixes?
NDA Mathematics 2019
NDA 2019
Mathematics
Easy
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Consider the following statements: 1.If A and B are mutually exclusive events, then it is possible that P(A) = P(B)…
NDA Mathematics 2019
NDA 2019
Mathematics
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There are 3 coins in a box. One is a two-headed coin; another is a fair coin; and third is…
NDA Mathematics 2019
NDA 2019
Mathematics
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If 5 of a Company’s 10 delivery trucks do not meet emission standards and 3 of them are chosen for…
NDA Mathematics 2019
NDA 2019
Mathematics
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Two dice are thrown simultaneously. What is the probability that the sum of the numbers appearing on them is a…
NDA Mathematics 2019
NDA 2019
Mathematics
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Consider the following discrete frequency distribution:x = 1 2 3 4 5 6 7 8f = 3 15 45 57…
NDA Mathematics 2019
NDA 2019