# Mathematics

 Question 1 of 20

What type of probability uses sample spaces to determine the numerical probability that an event will occur?

 A.classical probability B.subjective probability C.conditional probability D.empirical probability
 Question 2 of 20

If A and B are any two events with P(A) = .8 and then is:

 A.0.14 B.0.875 C..24 D.0.56
 Question 3 of 20

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?

 A.0.375 B.0.2441 C.0.625 D.0.1786
 Question 4 of 20

If one tosses a coin enough times, the proportion of “heads” will approach 0.5. This is an example of:

 A.the Central Limit Theorem B.subjective probabilities C.the Law of Large Numbers D.the Empirical Rule
 Question 5 of 20

If a die is rolled one time, find the probability of getting a number greater than 2.

 A.2 B.-1 C.5/6 D.4/6
 Part 2 of 6 –
 Question 6 of 20

The following data were obtained from a survey of college students. The variable X represents the number of non-assigned books read during the past six months.

 x 0 1 2 3 4 5 P (X=x) 0.2 0.25 0.2 0.15 0.1 0.1

Find P( X 5)

 A.1.00 B.0.10 C.0.20 D.0.90
 Question 7 of 20

The following data were obtained from a survey of college students. The variable X represents the number of non-assigned books read during the past six months.

 x 0 1 2 3 4 5 P (X=x) 0.2 0.25 0.2 0.15 0.1 0.1

What is the expected value of X?

 A.6.25 B.2.0 C.1.20 D.3.65
 Question 8 of 20

If a student randomly guesses at 20 multiple-choice questions, find the probability that the student gets exactly four correct. Each question has four possible choices.

 A.0.19 B.0.17 C.0.08 D.0.23
 Question 9 of 20

The variance of a binomial distribution for which n = 100 and p = 0.20 is:

 A.20 B.16 C.100 D.80
 Question 10 of 20

Which term is NOT synonymous with the expected value of a discrete probability distribution?

 A.mean B.μ C.variance D.theoretical average
 Part 3 of 6 –

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