A pair of dice is tossed. The chances of the total score being a prime number are:
A. 1/6
B. 5/12
C. 1/2
D. 7/9
Answer:B
A pair of dice is tossed. The chances of the total score being a prime number are:
A. 1/6 B. 5/12 C. 1/2 D. 7/9
Explanation: n(S) clearly equals (6 x 6) = 36.Let E be the probability that the total is a prime number. 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),P(E) = n(E)/n(S) = 15/36 = 5/12 .