The mean and variance of a random variable X having binomial distribution are 4 and 2 respectively. The P(X = 1) is
The mean and variance of a random variable X having binomial distribution are 4 and 2 respectively. The P(X = 1) is
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Let A and B be two events such that , and where stands for the complement o…
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A man is known to speak the truth 2 out of 3 times. He threw a dice cube with 1 to 6 on its faces and reports that it i…
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In an entrance test there are multiple choice questions, with four possible answer to each question of which one is cor…
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The harmonic mean of two numbers is 4. Their arithmetic mean A and the geometric mean G satisfy the relation 2A+G2…
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A and B are independent witness in a case. The chance that A speaks truth is x and B speaks
truth is y. If A and B agre…
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If is the mean of distribution of x, then usual notation is
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If E1 and E2 are two events associated with a random experiment such that P (E2) = 0.35, P (E1 or E2) = …
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Find a matrix X such that 2A + B + X = 0, whose A = and B =
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If in a triangle ABC, the altitudes from the vertices A, B, C on opposite sides are in HP, then sin A, sin B, sin C are…
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α, β are the roots of the an equation $x^2- 2x cosθ + 1 = 0$, then the equation having roots αn and…
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The equation (x-a)3+(x-b)3+(x-c)3 = 0 has
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Three positive number whose sum is 21 are in arithmetic progression. If 2, 2, 14 are added to them respectively then re…
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If + = , then
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The value of A that satisfies the equation asinA + bcosA = c is equal to
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If tan x = - 3/4 and 3π/2 < x < 2π, then the value of sin2x is
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