Respuesta :

Sample space ={1,2,3,4,5,6}

P(one "6) = 1/6
Q(NOT getting any "6) = 5/6

⁴C₂(P)²(Q)² = ⁴C₂(1/6)²(5/6)² = ⁴C²(25/1296)
⁴C₂ = (4!)/(2!)(2!) = 6

Then Probability(getting 2 "6" in 4 rolls) = 6(25/1296) = 25/216 = 0.1157