Allied & ICAR Exam Bank • ALLIED_0094 NAT • 2 Marks

Section 1: Engineering Mathematics

Probability and Statistics

Subtopic: Random variables

Question Statement:

A fair six-sided die is rolled once. The expected value (mean) of the face value is:

Answer Key:

3.5

Step-by-Step Solution & Explanation

$E[X] = \frac{1 + 2 + 3 + 4 + 5 + 6}{6} = \frac{21}{6} = 3.5$.
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