Let EA= The event that the sum of numbers on the dice was less than 6. EA={(1,4),(4,1),(2,3),(3,2),(2,2),(1,3),(3,1),(1,2),(2,1),(1,1)} ⇒ n(EA)=10 EB= The event that the sum of numbers on the dice is 3 EB={(1,2,(2,1)} ⇒ n(E2)=2 ∴ Required probability =