An engineer want to move across the country from A to B to work. On
different days,she mails a letter and resume to 3 different companies in B.
Suppose that a letter sent from A to B has a probability of 0.7 of reaching
B within 3days.
(a)能夠再三天內將三封信的兩封傳到B城市的可能性是多少?
(b)If the 3 letters are mailed together at the same time and location, how
does your conclusion in part a change? Explain.
沒有機率和統計的版
所以我來統計版問
會不會很奇怪啊？？
我不懂，就看很久寫不出來
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