From past experience, Anna knows that the probability that her friend will take her to dinner in Orro Resto id 0.7, the probability that they will watch movies is 0.5, and the probability that he will take her to dinner or they will watch movies is 0.9. What is the probability that they will do both? they will do neither?
4. From past experience, Anna knows that the probability that her friend will take her to dinner in Orro Resto id 0.7, the probability that they will watch movies is 0.5, and the probability that he will take her to dinner or they will watch movies is 0.9. What is the probability that
they will do both?
they will do neither?
5. Eight persons enter a supermarket. From the past experience, it is known that 25% of the people entering the supermarket make a purchase.
What is the possible values of the random variable X?
Construct the probability distribution of X.
X
P(X=x)
What is the probability that
1) at least four persons will make a purchase?
2) two or three persons will make a purchase?
3) a most two persons will make a purchase?
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