Question
Question 5 A group of 4 persons must be selected from a class of 40 students. In how many ways can it be selected? Question
Question 5
A group of 4 persons must be selected from a class of 40 students. In how many ways can it be selected?
Question 5 options:
91,390
2,193,360
160
10
Question 6
In a game, you have 1/33 probability of winning $121.00 and a 32/33 probability of loosing $7.00. What is your expected value?
Question 6 options:
-$6.79
$3.67
$10.45
-$3.12
Question 7
The brand name of a certain chain of coffee shops has a 53% recognition rate in the town of Coffeeton. (In other words, a person selected at random knows about the chain with a probability of 0.53.) An executive from the company wants to verify the recognition rate as the company is interested in opening a coffee shop in the town. He selects a random sample of 7 Coffeeton residents.
a) Find the probability that exactly 4 of the 7 Coffeeton residents recognize the brand name.
Question 7 options:
0.00819
0.287
0.0789
0.254
Question 8
The brand name of a certain chain of coffee shops has a 53% recognition rate in the town of Coffeeton. (In other words, a person selected at random knows about the chain with a probability of 0,53.) An executive from the company wants to verify the recognition rate as the company is interested in opening a coffee shop in the town. He selects a random sample of 7 Coffeeton residents. LetXbe the number of people (out of seven above) who will recognize the chain.
b) Find the mean and standard deviation ofX.
Question 8 options:
3, 1
Approximately, 3.71, 1.32.
Approximately, 4.04, 1.32.
Approximately, 2.71, 1.05
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