P(A)= Favorable outcomes/Total number of outcomes Calculation: According to the question Total number of possible outcomes =(6×6)=36 Favorable outcomes =(1,6),(2,5),(3,4),(6,1),(5,2),(4,3),(5,6),(6,5) P(A)= Favorable outcomes/Total number of outcomes ⇒P(A)=(8∕36) ⇒ 2/9 ∴ The probability that sum of the numbers on the faces is 7 or 11 is 2∕9