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Three dices are rolled down simultaneously, then what is probability of getting a sum of 4?

Three dices are rolled down simultaneously, then what is probability of getting a sum of 4? Correct Answer 1/72

Formula used:

Probability = Total number of outcomes/ Sample space

Calculation:

Sample space = 216

⇒ Possibility of outcomes = {(2,1,1), (1,2,1), (1,1,2)}

⇒ Possibility of outcomes = 3

Required probability = 3/ 216

∴ required probability is 1/ 72

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