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Two dice are thrown simultaneously. What is the probability that the sum of the numbers appearing on them is a prime number?

Options

  1. A5 12
  2. B1 2
  3. C7 12
  4. D2 3

Correct answer

A. 5 12

Step-by-step solution

Sum as prime number on 2 dices are: 2,3,5,7,11 no. of times each prime no. as sum occurs = array lc No. & Times 2 & 1 3 & 2 5 & 4 7 & 6 11 & 2 2 - 2 & 15 array P(E)= 15 36 = 5 12

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