• 2022-05-29
    设10张奖券中有4张可以中奖,每人依次任取1张,求(1)第1人中奖的概率.(2)第2人中奖的概率.(3)前3人中恰有一人中奖的概率.
  • 解 令  [tex=12.929x1.286]syLwF4wdczKzTBsNPZ2XbbZEfuMLSCnTOn4uU8Lj9ltjHVe4zFFLf9I3dmRFw3d4[/tex] , 则所求概率分别为(1)  [tex=7.071x2.786]fKF41nyD7pPtZ3Bgw1X4LIE3FIS6KouE+/yu1I98SgxpG1I8ohLPdKxv5KwLymRsIqqBeeSAr9hseJAhAKxeXQ==[/tex](2)  [tex=31.857x4.071]Jkg+NFnl6b/A2KciFopc57U6ofFuZSUeadIW0qptsL2gxq6Nhe0zcKEKlfPXpLsubdsmuM/RRFXels5PE6WGHomTmLKiZQylZbN82wlBbv1AeuizK3fmcaskzgm0D60YAEr2cI6kHwQ+YsuDk96+CpuM+jqAOW3B3527gMHi1f0MbSogEy0XMcyV7zbwBI8nG+tdKKzNO2tdts8uaLvgh3lY55/fmJtAJCUAuP2KGR4RuF5u4oUhrMFHLEc6uTWen7dZkbOEnFjIwT5GzVBQVX4RdCyWSNO9VZIerV6F7s0/ImcpuputbAylHsqISYScNdMw96mMibKX+m2zdnPUvZn11YzA9DhN0Sb3iF2zTUxlr8iNAAYYoSZ3MyKBxvaWlVUE3qGmxbfaM/1wSKArzkPsXRUVneyL30OBhGGE+qU3Xeat7zaCJzbn8IWKxz00a7iPMMrJRSRxxE8MlJEAfnIGrxh+Ni9Wo+5DPXsl2wY=[/tex](3)  [tex=17.857x3.143]qkbgck9+D3J5xm2VzNVV2cLIH70rOLdxgOty2Uq3YbMUTYipmP2kpVY/twmWilexgSPpnNvAJDU9eIM3mQ51OENvnAgc7g0ZYtPKJFIGl/KKQvfOriXaLwtiRM1nPFw2rwoTdVHFod5ncmrLWAvv5ZITTZ7pY9RHWPlzx6lNJQWFX0F9ClPxay4wyNYyphRnPw3Vb6kF84kJ5eL3L/DG/k68OxMcYPCjXb8V6Sy9zou+m1cb4+HRvpeJaqCnzWvK78LjFQpn13lLWDl/RLs8YwAlKFEkHLVjmQYWigRb4QZZBuonZvCDs9jawbc/ExxAlOLsL9rYlRFjUwwAxxuBUA==[/tex][tex=27.071x1.5]9RZpALNo+6ujk/jSySz/bYkwAm0FWQoyQofiqsBYMAQo8fFuAtPopjvakrMLBw9oRhvKoUwGjEmy3wnND6VUT6+wNYnTFdHpT0DEMpP01rCe2SeeNC+peg5PJixR3vVGFAysIumLeeLg8nxukkNZRFuDsknQTFemDqerAHS1MYgPj4UC9RSoN0Y9KSsNpnHv4N+saXVJsW7T7Wjb8WoQ7Zq1t1KN95NRYC9097gVkEx5CHKMii4cFIPAfhA6Q7ZnNc9lR94vc3QIkCxEnldnhWEoAItXWgewl99bC/moGW8=[/tex][tex=13.571x1.5]Iqm5A14CUvGAHFt8pEEo5qldhaHVVQieuxEIMV3ZQE9EE5Deu+ZdDMi91OYM9YayOCErMxgHZVBo6zrAzEYhcM+eunopwyM18g65s40dbhQfUqJFMABH1I++2NO4x9ISOm9eQVWgHmUSBPqavusKb8ETjNJHMklPHm8RSICh1j4=[/tex][tex=25.071x2.786]cdJCE/jUKfX9AK1P+IX+gLCP6c8Szaw7ks69XMMObWE/d3aaQv5Ok+xYYQwQVP+RIr701gY7SQvf3/3LZi8uhpajOD7IFX6m6qs87NptWOdY2WpDHm922qAplybnkqX9Sz/LloPmUCEBC2B7yG5yx94wWYVZef72e/SsIV2Z4mjsh2FjVhTk10w/mNiEHoL8hJV8b0mFtXHpGrql7WZ8kgH2mZKqYDDf8oOeEhnV9dKXNGnqqkMsr1FBQWV1qV3SIiNjUCTNcz1RbQpTDywlIUQFlrydhRe3YLp8LDaWrxDcpjrPz3MgjoTcU7cco8Kszd+jiskniJZ5/ZqMvEFYdfSznrFEJQdZBa7kdqzWilQzqivkNaVRLKJi9Gsp+WyIjDfMQuCsa6EaVukYfARcPOZO2pzz6eBuApyVL57kRDU=[/tex]

    举一反三

    内容

    • 0

      【简答题】在 10000 张有奖储蓄的奖券中,设有 1 个一等奖, 5 个二等奖, 10 个三等奖,从中买一张奖券,求: ( 1 )分别获得一等奖、二等奖、三等奖的概率; ( 2 )中奖的概率

    • 1

      n张奖券中含有m张有奖的,k个人购买,每人一张,其中至少有一人中奖的概率为

    • 2

      若买彩票中奖的概率为10%,则买一张彩票中奖的概率与买十张彩票都不中奖的概率:

    • 3

      10张奖券中含有3张中奖的奖券,现有三人每人购买1张,则恰有一个中奖的概率为()

    • 4

      10张奖券中含有2张中奖的奖券,每人购买一张,则前4个购买者中恰有一人中奖的概率是()。 A: 0.8<sup>4</sup> B: 0.1 C: C<sub>10</sub><sup>4</sup>0.2·0.8<sup>3</sup> D: 0.8<sup>3</sup>·0.2