When two dice are rolled simultaneously:
Total number of possible outcomes in sample space $S$ = $6 \times 6 = 36$.
Favourable outcomes where the sum of two dice equals 9:
Number of favourable outcomes $n(E) = 4$.
Probability:
$$P(E) = \frac{n(E)}{n(S)} = \frac{4}{36} = \frac{1}{9}$$दो पासों को एक साथ फेंकने पर:
कुल संभावित परिणाम $n(S) = 6 \times 6 = 36$
पासों के अंकों का योग 9 आने की अनुकूल घटनाएं:
प्रायिकता:
$$P(E) = \frac{n(E)}{n(S)} = \frac{4}{36} = \frac{1}{9}$$