Question Library
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If A and B are two events such that P(not A) = 7/10, P(not B) = 3/10 and P(A|B) =…
NDA Mathematics 2021
NDA 2021
Mathematics
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What is the probability that the roots of the equation x² + x + n = 0 are real, where…
NDA Mathematics 2021
NDA 2021
Mathematics
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3-digit numbers are formed using the digits 1, 3, 7 without repetition of digits. A number is randomly selected. What…
NDA Mathematics 2021
NDA 2021
Mathematics
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If ∑(i=1 to 10) xᵢ = 110 and ∑(i=1 to 10) xᵢ² = 1540, then what is the variance?
NDA Mathematics 2021
NDA 2021
Mathematics
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What is the mean deviation of the first 10 even natural numbers?
NDA Mathematics 2021
NDA 2021
Mathematics
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If the harmonic mean of 60 and x is 48, then what is the value of x?
NDA Mathematics 2021
NDA 2021
Mathematics
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If g is the geometric mean of 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, then which one…
NDA Mathematics 2021
NDA 2021
Mathematics
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The mean of 10 observations is 5·5. If each observation is multiplied by 4 and subtracted from 44, then what…
NDA Mathematics 2021
NDA 2021
Mathematics
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For the set of numbers x, x, x+2, x+3, x+10 where x is a natural number, which of the following…
NDA Mathematics 2021
NDA 2021
Mathematics
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What is the mean of natural numbers contained in the interval [15, 64]?
NDA Mathematics 2021
NDA 2021
Mathematics
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The marks obtained by 60 students in a certain subject out of 75 are given below : What is the…
NDA Mathematics 2021
NDA 2021
Mathematics
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The marks obtained by 60 students in a certain subject out of 75 are given below : What is the…
NDA Mathematics 2021
NDA 2021
Mathematics
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Two regression lines are given as 3x -4y+8=0 and 4x – 3y– 1= 0. Consider the following statements : 1.…
NDA Mathematics 2021
NDA 2021
Mathematics
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Two regression lines are given as 3x − 4y + 8 = 0 and 4x − 3y − 1 =…
NDA Mathematics 2021
NDA 2021
Mathematics
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In a cricket match, a batsman hits a six 8 times out of 60 balls he plays. What is the…
NDA Mathematics 2021
NDA 2021
Mathematics
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A problem is given to three students A, B and C, whose probabilities of solving the problem independently are 1/2,…
NDA Mathematics 2021
NDA 2021
Mathematics
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When the measure of central tendency is available in the form of mean, which one of the following is the…
NDA Mathematics 2021
NDA 2021
Mathematics
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If P(A|B) < P(A), then which one of the following is correct?
NDA Mathematics 2021
NDA 2021
Mathematics
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Consider the following relations for two events E and F: 1. P(E ∩ F) ≥ P(E) + P(F) − 1…
NDA Mathematics 2021
NDA 2021
Mathematics
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The tangent to the curve x^2 = y at (1,1) makes an angle:
NDA Mathematics 2021
NDA 2021