Choose 2 numbers from the numbers 5, 6, and 7 to form a two-digit number. What is the probability that the two-digit number formed is an even number?
从数字5、6、7中任选2个数字组成两位数，组成的两位数是偶数的可能性是多少．
<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>