alleryCAT MCQ scoring is +3 for correct, −1 for wrong. The expected value of a pure random guess on a 4-option MCQ is:
A$+3$ marks always
B$-1$ marks always
CExactly $0$ marks
D$+1$ mark on average
Answer & Solution
Correct answer: C. Exactly $0$ marks
E = (1/4)(+3) + (3/4)(-1) = 0.75 − 0.75 = 0. Pure-random guesses on 4-option MCQs are zero-expectation.
Worth attempting only if you can eliminate 1+ options.
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