The average height of 16 elementary school students is 1.5 meters, some of them are below 1.5 meters, their average height is 1.3 meters, and some of them are higher than 1.5 meters, their average height is 1.8 meters, so how many students are there at most? The height is exactly 1.5 meters.
16名小学生的平均身高为1.5米，其中有一些低于1.5米的，他们的平均身高是1.3米，另一些高于1.5米的，他们的平均身高是1.8米，那么最多有多少位同学的身高恰好是1.5米．
<gadget id="calculator">16 - 5</gadget>
<output>11</output>

<result>11</result>