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grigory [225]
3 years ago
15

A professor divided the students in her business class into three groups: those who have never taken a statistics class, those w

ho have taken only one semester of a statistics class, and those who have taken two or more semesters of statistics. The professor randomly assigns students to groups of three to work on a project for the course. 65% of the students have never taken a statistics class, 15% have taken only one semester of a statistics class, and the rest have taken two or more semesters of statistics. Round your answers to three decimal places.
a. What is the probability that the first groupmate you meet has studied at least two semesters of statistics?
b. What is the probability that the first groupmate you meet has studied some statistics?
c. What is the probability that neither of your two groupmates has studied any statistics?
d. What is the probability that your two groupmates have studied at least one semester of statistics?
e. What is the probability that at least one of your two groupmates has studied more than one semester of statistics?
Mathematics
1 answer:
bazaltina [42]3 years ago
4 0

Answer:

Step-by-step explanation:

a;23

b;23

c97

d18

e29

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Answer:

2.3 × 10^-7

Step-by-step explanation:

First, create an equation with the initial decimal being the coefficient multiplied by 10 to the power of 0.

(For example, let’s create the starting scientific notation equation for the decimal 475,000).

475,000 = 475,000 × 10^0

-------------------------------------------------------------------------------------------------------------

Now that we have an equation, the second step is to move the decimal point in the coefficient until there is 1 significant digit to the left of the decimal point. For each space the decimal point is moved to the left, increase the exponent by 1.

(Continuing the example above, move the decimal point to the left and increment the exponent.).

475,000 = 475,000.0 × 10^0

475,000 = 47,500.0 × 10^1

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475,000 = 475.0 × 10^3

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Step-by-step explanation:

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