在10立方米的沙子中藏有一个玻璃球，假定这个玻璃球在沙子中的任何一个位置是等可能的，若取出1立方米的沙子．求取出的沙子中含有玻璃球的概率．

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解：记事件A为“取1立方米沙子中含有玻璃球”，

则事件A发生对应的沙子体积与原沙子体积之比为1：10．

∵玻璃球在沙子中任何位置等可能，

∴由几何概型概率计算公式得P（A）= 10

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B

Indoor Water Park
Opening time	◆9: 00a.m.--6:00p.m. from Monday to Friday ◆8: 00a.m.- 10: 00p.m. from Saturday to Sunday
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