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1. |
The calculus class is preparing for the Advanced Placement Exam. If there are 12 girls in a class of 20, how many study groups of 3 girls and 2 boys can be formed? |
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A. |
8395 |
B. |
110 |
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C. |
6160 |
D. |
5670 |
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Hint |
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2. |
Find 8P3. |
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A. |
24 |
B. |
1,680 |
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C. |
336 |
D. |
21 |
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Hint |
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3. |
A briefcase combination lock contains 4 digits. Each digit is a number between 0 and 9. How many different combinations are possible if each number can only be used once? |
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A. |
7,200 |
B. |
5,040 |
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C. |
40 |
D. |
10,000 |
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Hint |
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4. |
A briefcase combination lock contains 4 digits. Each digit is a number between 0 and 9. If each number can only be used once, what is the probability that all four digits are odd? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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5. |
A composition teacher needs to choose 10 students out of 15 to serve as rough draft reviewers. A group of 10 seniors, 3 juniors, and 2 sophomores have volunteered. If the students are chosen randomly, what is the probability that 6 seniors, 2 juniors, and 2 sophomores will be selected? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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