Two dice are tossed. The probability that the total score is a prime number is?
Pick:
A) 1/2
B) 5/12
C) 7/9
D) 1/6
E) 1/12
Clearly, n(S) = (6 x 6) = 36.   Let E = Event that the sum is a prime number.   Then E= { (1, 1), (1, 2), (1, 4), (1, 6), (2, 1), (2, 3), (2, 5), (3, 2), (3, 4), (4, 1), (4, 3),   (5, 2), (5, 6), (6, 1), (6, 5) }   n(E) = 15.   P(E) =n(E)/n(S)=15/36=5/12   hence:5/12
<result>B</result>
Two dice are tossed. The probability that the total score is a prime number is?