math 302 help now please

/in /by
Part 1 of 6 –
 
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
 1.0 Points
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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Part 2 of 6 –
 
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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Part 3 of 6 –
 
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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