مـادة إحصــاء أعمال 271

[*Reem*]

هذي الأسئلهـ :

10)In a Binomial situation n=5 and π=40 Determine the probabilities of the
following events using the binomial formula
x=1
x=2


13)An American society of investors survey found 30 percent of individual investors have used a discount broker in a random sample of 9 individuals .what is the probabillity
a)Exactly 2 of the sampled individuals have used a discount broker
b)Exactly 4 of them have used a discount broker
c)None of them have used a discount broke