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There is a box containing~$7$ chips numbered $1$, $2$, $3$, $4$, $5$, $6$, and $7$. A chip is drawn randomly from the box. What is the probability that the number on the chip is an even number? (adapted from 2015 AMC 8 Problem, Question \#7) 
Overseas Competition->Knowledge Point->Counting Modules->Statistics and Probability
$2$, $4$, and $6$ are even numbers. Thus, the probability is $\frac37$. 