There are 5 red checkers and 5 green checkers in the box. Naughty draws one at random, and touches red checkers and green checkers. Naughty draws one randomly.
盒子里有5个红色跳棋和5个绿色跳棋，淘气任意摸出一个，摸到红色跳棋和绿色跳棋，淘气任意摸出一个，摸到红色跳棋和绿色跳棋的可能性多少．
<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>