What is the probability of choosing 2 girls from 2 boys and 2 girls?
从2名男生和2名女生中选出2名女生的可能性为多少
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>