CUET · MATHS · PYQ PAPER 2023
For the following probability distribution:
| X | -4 | -3 | -2 | -1 | 0 |
| p(x) | 0.1 | 0.2 | 0.3 | 0.2 | 0.2 |
- A 0
- B -1.8
- C -1.6
- D -1
Answer & Solution
Correct Answer
(B) -1.8
Step-by-step Solution
Detailed explanation
\(E(X) = \sum x \cdot p(x)\) \(E(X) = (-4)(0.1) + (-3)(0.2) + (-2)(0.3) + (-1)(0.2) + (0)(0.2)\) \(E(X) = -0.4 - 0.6 - 0.6 - 0.2 + 0\) \(E(X) = -1.8\)
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