Test Index

Probability

Question : 48 of 127

Marks: +1, -0

What is the chance of throwing at least 7 in a single cast with 2 dice?

Solution:

Concept:

Probability = (number of favorable outcomes) / (total outcomes).

Explanation:

Total outcomes when throwing two dice:

6 \times 6 = 36

Outcomes with sum at least 7: sum 7 (6 ways), sum 8 (5 ways), sum 9 (4 ways), sum 10 (3 ways), sum 11 (2 ways), sum 12 (1 way).

Total favorable =

6+5+4+3+2+1 = 21

Probability =

\frac{21}{36} = \frac{7}{12}

Answer:

\frac{7}{12}

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