Question 9
A football match can be won, drawn or lost with equal probability. A school plays 2 matches each week. The probability that at least one match is drawn that week is $m/n$. Find $m+n$.
Practice assumptions: the results of the two matches are independent, and m/n is written in lowest terms with positive integers m and n. These conditions are implicit, not expressly stated in the source.
Practice assumptions: the results of the two matches are independent, and m/n is written in lowest terms with positive integers m and n. These conditions are implicit, not expressly stated in the source.