Problem
COM-B1-M01-P001 One Choice from Two Groups
#1
★☆☆☆☆ Level 1 of 5
A box contains \(6\) red and \(5\) blue cards. In how many ways can one card be chosen?
Choosing a red card and choosing a blue card are disjoint cases.
There are \(6+5=11\) cards in total, so one card can be chosen in \(11\) ways.
Direct use of the sum rule.