Mr. A has been assigned to check Statistics, Probability, and Calculus papers. The decision to check Statistics, Probability or Calculus papers is random. What is the probability that he checks the Probability papers in the end?
There are 3! = 6 possible orders.....we are interested in either { S, C ,P} or {C, S, P}
So ..... 2/6 = 1/3 ≈ 33.33%
+77 
