• 2022-05-27
    掷两枚骰子,求下列事件的概率:(1) 点数之和为7; (2) 点数之和不超过 5 ;(3)点数之和为偶数
  • 解  这是一个古典概型的问题. 由题意可知,样本空间[tex=22.643x8.786]bs32633vTz7bb0qLmXZ4x1AEBYRuG+7yzhoDlFgGFcFdCGGrHjrz3MDtvmRmLDmcx2wV4nKMvvIrC4VYw+Vl4KniCByzJe7YjEbo1FRmLmogz5Xsufmw/aNGpjF8aqE5nmO94QAUr0h3rNCAi6b2dBtiaMRmobnyUcdWXj4p9MIpxXZvu05AQj12AzEIGAYfesF+x+KPz2VQdXLhT6V/duxX1MzmS1fSgETItNm4Uo45zVzqPDqPI954ggCaE/PgamnVEzCM8mcPMe6RrdFD+masd72wEE553qwHR4hu786Wl11YgBOcYZVkOD+lcmvIyXPFBVh8UTzal47upQlGRJ5Tm6chniM1pvvgZSb6HLlOAwC7aTgp5UF3QlJBJwheBngYIeZxmFYrP8E7CvkPy2PX6r6PDfWdvChJwg2eG1qO9mWBOoWDkTG51AYO4hdOY0x3OwVYasZoiTJOp8XNohSi8r5mB4v/OcyU8/haqo8=[/tex](1) 记 A="点数之和为 7 "[tex=17.643x1.357]r2u3cbzaX2zpoGVV1TL23/7w3OlfHQSNPDyNO0bM87OczcEvkSBVJma8Ex9cJ/es[/tex][tex=19.857x2.286]YiQ/oM2yLo11dwUEv3/Ro2Aqg5USSXDOlBmZ995Ynn+PnvLj36ZCifFV4fGPAgFiPie9W+WGV/NBfVeaAS71A1yrWhGAAXR8VhoCtkdqXVA/11nYwh9QIG9gFIvcynXuOGAz3UgOp8j4RFVnSyyk0flb9IuaZhUumfxZnkERB/I=[/tex](2) 记 B=“点数之和不超过 5 "[tex=28.0x1.357]dquMZ3KUc62SsNcDH0nEnquXyGO1Sf8fFpTeFvl5/2aL0USmPDXVDw4XIJ/FC5qfsQR3vjKlIQF21Kiwr89zeL2djnY9Eu4CYWYzk+sonlw=[/tex],[tex=7.214x2.357]03pTK75AACw1pvgNP7b9WN1q2nwJhLEK6W7Med21gOv9PpnQgmzFhumTYlje4R8e[/tex] (3) C= "点数之和为偶数" [tex=20.0x4.5]ZMpInUK7OYCCGYrMpKvuRU4ClaPYeWTz2lND3ehKIuBZ0lrc2t2MYyA/CtyuWyLTD9BqK94lRoj9oydeXyl2sdAJvvoN/EoVL7xF9Ua83mLRVzXwvjlpWgjX6rfH3yFK0jLmRFJTVi08WjwQitL4EqzbdZzhH2yqh8oJM9vb7hNo00Kgx/1HWTYvRqeIOcF73bIFZUSJcIZDZBMC2A7EUExN3bWjsL1gfD/6IEIeX+w=[/tex] [tex=6.571x2.357]txwx5+3g2IxSWlUNGOWmm0C/AnBIxwWKDVKQ+CKZ/Kw=[/tex]

    内容

    • 0

      业)同时掷两枚骰子,已知两枚骰子点数之和为7,则其中一枚为一点的概率为( )

    • 1

      掷两颗骰子,在第一枚骰子出现的点数能够被3整除的条件下,则两枚骰子出现的点数之和大于8的概率为( )。

    • 2

      掷两枚骰子,点数之和为8,有种情况

    • 3

      掷两枚骰子,点数之和为8,有( )种情况

    • 4

      掷两枚骰子,事件“点数都为偶数且点数和大于7”的概率等于(