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प्रश्न
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A discrete probability distribution may be represented by
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संबंधित प्रश्न
If µ and σ2 are the mean and variance of the discrete random variable X and E(X + 3) = 10 and E(X + 3)2 = 116, find µ and σ2
The time to failure in thousands of hours of an electronic equipment used in a manufactured computer has the density function
`f(x) = {{:(3"e"^(-3x), x > 0),(0, "eleswhere"):}`
Find the expected life of this electronic equipment
Let X be a continuous random variable with probability density function
f(x) = `{{:(3/x^4",", x ≥ 1),(0",", "otherwise"):}`
Find the mean and variance of X
A person tosses a coin and is to receive ₹ 4 for a head and is to pay ₹ 2 for a tail. Find the expectation and variance of his gains
Let X be a random variable and Y = 2X + 1. What is the variance of Y if variance of X is 5?
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Demand of products per day for three days are 21, 19, 22 units and their respective probabilities are 0.29, 0.40, 0.35. Profit per unit is 0.50 paisa then expected profits for three days are
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Which of the following is not possible in probability distribution?
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A discrete probability function p(x) is always non-negative and always lies between
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The distribution function F(x) is equal to
Prove that V(aX) = a2V(X)
