Three dice rolled. P(sum = 4) equals
A1/24
B1/216
C1/36
D1/72
Answer & Solution
Correct answer: D. 1/72
1. Total outcomes = 6^3 = 216.
2. Favourable for sum 4: (1,1,2),(1,2,1),(2,1,1) -> 3 outcomes.
3. P(sum = 4) = 3/216.
4. = 1/72.
_Source: ICAI BoS Foundation Paper 3, Ch 15 'Probability', p.7_
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