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A discrete probability distribution may be represented by
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संबंधित प्रश्न
The following table is describing about the probability mass function of the random variable X
| x | 3 | 4 | 5 |
| P(x) | 0.2 | 0.3 | 0.5 |
Find the standard deviation of x.
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
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Probability which explains x is equal to or less than a particular value is classified as
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Given E(X) = 5 and E(Y) = – 2, then E(X – Y) is
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A probability density function may be represented by
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E[X – E(X)] is equal to
Prove that if E(X) = 0, then V(X) = E(X2)
Prove that V(aX) = a2V(X)
The time to failure in thousands of hours of an important piece of electronic equipment used in a manufactured DVD player has the density function
f(x) = `{{:(2"e"^(-2x)",", x > 0),(0",", "otherwise"):}`
Find the expected life of this piece of equipment
