There are 10 two kinds of balls of the same size, shape and different colors in the pocket. If the probability of touching the two kinds of balls is the same, please design how much.
口袋中有大小、形状相同，颜色不同的两种球10个，若要摸到两种球的可能性一样大，请你设计方案多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 * (1/2)</gadget>
<output>5</output>

<result>5</result>