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1. |
How many lines are determined by 7 points, no three of which are collinear? |
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A. |
200 |
B. |
42 |
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C. |
105 |
D. |
21 |
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Hint |
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2. |
Find 12P4. |
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A. |
19,958,400 |
B. |
11,880 |
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C. |
95,040 |
D. |
42 |
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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. |
10,000 |
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|
C. |
5,040 |
D. |
40 |
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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. |
How many different ways can a coach make a team of 18 players from a tryout of 20 people? |
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A. |
3,420 |
B. |
190 |
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C. |
380 |
D. |
6,840 |
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Hint |
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