Yahoo 知識+ 將於 2021 年 5 月 4 日 (美國東岸時間) 停止服務,而 Yahoo 知識+ 網站現已轉為僅限瀏覽模式。其他 Yahoo 資產或服務,或你的 Yahoo 帳戶將不會有任何變更。你可以在此服務中心網頁進一步了解 Yahoo 知識+ 停止服務的事宜,以及了解如何下載你的資料。

Lau 發問於 社會及文化語言 · 5 月前

Probabilities?

A certain electronics device has three independent components A,B and C.  Within the first year of use, the probabilities that A, B and C will malfunction are 0.2,0.3 and 0.4 respectively.  The device will not function properly under any of the following situation.

(1) A malfunctions, or   (2) B and C both malfunction

Find the probability of the following event

the device function properly within the first year of use

4 個解答

評分
  • 4 月前
    最愛解答

    There are 3x independent cases when the device functions properly:

    1. All A, B, C are good.

    The probability = 0.8 x 0.7 x 0.6

    2. A good, B bad, C good.

    The probability = 0.8 x 0.3 x 0.6

    3. A good, B good, C bad.

    The probability = 0.8 x 0.7 x 0.4

    So, the probability of working properly = p(1) + p(2) + p(3) = 0.704

  • 匿名
    4 月前

    ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

  • 5 月前

    We can talk to each other and be a good friends. ... ... ... ... ...

  • 匿名
    4 月前

    P= 1 - (0.2 + 0.3 x 0.4) = 0.68

還有問題嗎?立即提問即可得到解答。