Business, 02.08.2021 18:00 Peterson6164

Please help me in these question ؟؟؟؟ 1) A school bag contains 12 pens of which 5 are red and the other are black. 4 pens are selected from the bag.
(a) How many different samples of size 4 pens are possible?
(b) How many samples have 3 red pens and 1 black pen?
(c) How many samples of size 4 contain at least two red pens?
(d) How many samples of size 4 contain at most one black pen

2)If the average yield of cucumber acre is 800 kg, with a variance 1600 kg, and that the amount of the cucumber follows the normal distribution.
1- What percentage of a cucumber give the crop amount between and 834 kg?
2- What the probability of cucumber give the crop exceed 900 kg ?

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Please help me in these question ؟؟؟؟ 1) A school bag contains 12 pens of which 5 are red and the o...

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