An exam was given to a group of freshman and sophomore students. The results are below: Freshman: 106 got A’s, 130 got B’s, and
1 answer:
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Answer:
(a)
(b)
<em>(b) is the same as (a)</em>
(c)
(d)
(e)
Step-by-step explanation:
Given
Solving (a): Probability of 3 or fewer CDs
Here, we consider:
This probability is calculated as:
This gives:
Solving (b): Probability of at most 3 CDs
Here, we consider:
This probability is calculated as:
This gives:
<em>(b) is the same as (a)</em>
<em />
Solving (c): Probability of 5 or more CDs
Here, we consider:
This probability is calculated as:
This gives:
Solving (d): Probability of 1 or 2 CDs
Here, we consider:
This probability is calculated as:
This gives:
Solving (e): Probability of more than 2 CDs
Here, we consider:
This probability is calculated as:
This gives: