Question

Two dice are thrown find probability of sum of numbers divisible by 9​

Answer 1

Answer:

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The sum can be 3 or 4 or 6 or 8 or 9 or 12.

For 3 - (1,2) (2,1) - 2 ways

For 4 - (1,3) (2,2) (3,1) -3 ways

For 6 - (1,5) (2,4) (3,3) (4,2) (5,1) - 5 ways

For 8 - (2,6) (3,5) (4,4) (5,3) (6,2) -5 ways

For 9 - (3,6) (4,5) (5,4) (6,3) - 4 ways

For 12 - (6,6) - 1 way

Favorable ways = 20

Total ways = 6 x 6 = 36

Probability = 20/36 = 5/9

Answer 2

Total Number of combinations Probability

9                           4                                        11.11%

Step-by-step explanation: