sprinkles671 sprinkles671
  • 11-05-2018
  • Mathematics
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A pair of dice are rolled. What is the probability of rolling 4 or greater?

A: 5/36
B: 1/18
C: 1/36
D: 11/12

Respuesta :

Edufirst
Edufirst Edufirst
  • 12-05-2018
Answer: option D: 11/12

Explanation:

1) The sample space is formed by 36 pairs: 6×6 = 36.

2) Roolling 4 or more is the same that not rolling 3 or less

3) Rolling 3 or less are (1,1), (1,2), and (2,1). Those are 3 outcomes out of 36.

4) Therefore, not rolling 3 or less (the same that rolling 4 or more) has 36 - 3 = 33 outcomes out of 36.

5) The probability of 33 out of 36 is 33/36

6) Simplify the fraction 33/36 = 11/12

And that is the answer.


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