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Let be a discrete random variable. The probability distribution of is given below: Then will be:
Let $X$ be a discrete random variable. The probability distribution of $X$ is given below:
Then $E(X)$ will be:
| $X$ | $30$ | $10$ | $-10$ |
|---|---|---|---|
| $P(X)$ | $\frac{1}{5}$ | $\frac{3}{10}$ | $\frac{1}{2}$ |
- (a)$1$
- (b)$4$
- (c)$2$
- (d)$30$
Answer
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From ISC 2025 Mathematics Paper 1, question 1(x).