مساعده في.........

[طالبه]

السلام عليكم ....
انا عضوه جديده وحابه اعرف ماهو علم الإكتواري يندرج تحت اي علم من العلوم ....
وعندي سؤالين مش علرفه حلهم ياريت احد يساعدني...

: from a group of 3 freshmen, 4 sophomores, 4 juniors, and 3 seniors a committee of size 4 is randomly selected. Find the probability that the committee will consist of
- One from each class؟
- sophomores and 2 juniors؟





The owner of camera shop receives a shipment of 5 cameras from a camera manufacturer . tow of these cameras are defective .Suppose that the owner selects two of the five cameras at random and tests them, find the probability that
-both cameras are defective؟
-neither camera is defective؟
-at least one camera is defective؟
-the first camera tested is defective؟

بليز ساعدوني

[Saud]

<span style="font-size:12pt;line-height:100%">وعليكم السلام ورحمة الله وبركاته

بالنسبة لمعلومات عن العلم الإكتواري فتجدينها في الرابط التالي

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أما بالنسبة للأسئلة فالرابط التالي يحتوي على امثلة ستساعدك في حلها ان شاء الله

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[طالبه]

يعطيك العافيه اخ سعود...

[ساري]

for the first question :

from a group of 3 freshmen, 4 sophomores, 4 juniors, and 3 seniors a committee of size 4 is randomly selected
- One from each class؟
(1/3 )* (1/4)*(1/4)*(1/3)=

- sophomores and 2 juniors؟

(1/3 )* (1/4)*(1/4)*(1/3)=


The owner of camera shop receives a shipment of 5 cameras from a camera manufacturer . tow of these cameras are defective .Suppose that the owner selects two of the five cameras at random and tests them, find the probability that
-both cameras are defective؟
(2/5 )* (1/4)
-neither camera is defective؟
(3/5 )* (2/4)

-at least one camera is defective؟
1 - ( (3/5 )* (2/4) )


-the first camera tested is defective؟
(2/5 )