Question

In a single throw of two dice, the probability of obtaining a total of 7 or 9, is

• A. $\frac { 5 } { 18 }$
• B. $\frac { 1 } { 6 }$
• C. $\frac { 1 } { 9 }$
• D. None of these

Answer 1

Answer: (A)

$\frac { 5 } { 18 }$

Answer 2

$7 \rightarrow \{ ( 6,1 ) , ( 5,2 ) , ( 4,3 ) , ( 3,4 ) , ( 2,5 ) , ( 1,6 ) \}$

$9 \rightarrow \{ ( 6,3 ) , ( 5,4 ) , ( 4,5 ) , ( 3,6 ) \}$

Required probability