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Probability
Classical Probability
JEE Main 2019
Grade 12

Question:

Two dice are thrown together. The probability that the sum of the numbers on them is 7 is:
(1) $\frac{1}{6}$
(2) $\frac{1}{12}$
(3) $\frac{5}{36}$
(4) $\frac{1}{9}$

Step-by-Step Solution

Key Concept: List the total number of equally likely outcomes when two dice are thrown, and count exactly how many ordered pairs $(a, b)$ satisfy $a + b = 7$.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: (1)

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