Moderate -0.5 This is a straightforward binomial probability calculation requiring identification of parameters (n=10, p=1/6) and summing P(X=3) + P(X=4) + P(X=5) using the standard formula. While it involves three terms and careful arithmetic, it's a routine textbook exercise with no conceptual challenges beyond applying the binomial distribution formula correctly.
A fair die is thrown 10 times. Find the probability that the number of sixes obtained is between 3 and 5 inclusive. [3]
\hfill \mbox{\textit{CAIE S1 2015 Q1 [3]}}