There are 4 red pencils and 6 blue pencils in a pocket. If you draw a pencil at random from this pocket, what is the probability that you will find a red pencil?
一个口袋里装了4支红铅笔、6支蓝铅笔，从这个口袋里任意摸出一支铅笔，摸到红铅笔的可能性是几分之几？
<gadget id="calculator">4 + 6</gadget>
<output>10</output>

<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>