Question 1 of 20

1.0 Points 
In a genetics experiment 5 flowers out of 8 were bicolor, and the rest were solid color. If 3 of the flowers are selected at random without replacement, what is the probability that all 3 are bicolor?
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Question 2 of 20

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Three cards are drawn from a deck without replacement. What is the probability that all three cards are clubs?
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Question 3 of 20

1.0 Points 
The probability of an event and the probability of its complement always sum to:
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Question 4 of 20

1.0 Points 
The formal way to revise probabilities based on new information is to use:
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Question 5 of 20

1.0 Points 
Sue has 10 pictures but only has space in her apartment to hang 4 of them on a wall. The number of different arrangements of four pictures from a selection of ten pictures is:
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Question 6 of 20

1.0 Points 
Find the variance of the following probability distribution.
X 
P(X) 
1 
0.20 
2 
0.15 
3 
0.25 
4 
0.25 
5 
0.15 
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Question 7 of 20

1.0 Points 
Suppose that 50 identical batteries are being tested. After 8 hours of continuous use, assume that a given battery is still operating with a probability of 0.70 and has failed with a probability of 0.30.
What is the probability that fewer than 25 batteries will last at least 8 hours?
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Question 8 of 20

1.0 Points 
Suppose that 50 identical batteries are being tested. After 8 hours of continuous use, assume that a given battery is still operating with a probability of 0.70 and has failed with a probability of 0.30.
What is the probability that fewer than 40 batteries will last at least 8 hours?
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Question 9 of 20

1.0 Points 
A drug is reported to benefit 40% of the patients who take it. If 6 patients take the drug, what is the probability that 4 or more patients will benefit?
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Question 10 of 20

1.0 Points 
We assume that the outcomes of successive trials in a binomial experiment are:
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Question 11 of 20

1.0 Points 
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (), spaces (e.g., as thousands separator, 5 000), “E” or “e” (used in scientific notation).
NOTE: For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where “a” and “b” need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
Find the mean of the following probability distribution?
1

0.20

2

0.10

3

0.35

4

0.05

5

0.30

Place your answer, rounded to two decimal places, in the blank.



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