Question

The probability that in the toss of two dice we obtain the sum of 7 or 11 is

• A. 1/6
• B. 1/18
• C. 2/9
• D. 23/108

Answer 1

Answer: (C)

2/9

Answer 2

n(S) = 6 x 6 = 36

E = {(1, 6), (2, 5), (3, 4), (4, 3), (5, 2), (6, 1), (5, 6), (6, 5)}

n(5) = 8

P(5) = $\frac { 8 } { 36 } = \frac { 2 } { 9 }$