List of practice Questions

X+2Y=5 and 2X+3Y=8. Find the Mean of X and Y.

If a function \(f:[0,1]\to\mathbb{R}\) is differentiable, \(f'(0) = -1\) and \(f'(1) = 5\), then which one of the following statements is true?

Consider a discrete random variable \( X \) whose probabilities are given below. The standard deviation of the random variable is ......... (round off to one decimal place).

Consider a discrete random variable \( X \) whose probabilities are given below. The standard deviation of the random variable is ......... (round off to one decimal place).
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