Free Practice Question
PS · Problem Solving
sub-505
Combinations
In a renowned cat exhibition, seven cats of various breeds are to be showcased on seven consecutive platforms. If the Siamese cat is required to be placed on the rightmost platform, how many different arrangements of the seven cats can be made?
Answer Choices
Correct answer marked belowA
6
B
42
C
504
720
Correct
E
5040
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Explanation
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Official Explanation
Official
This is a simple permutation problem. Since the Siamese cat occupies the rightmost platform, we have 6…
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Comments
2
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S
SuraiyaMar 29, 2024
Greatt
M
MaxJun 15, 2024
thanksss
What this question tests
What it tests
Whether you can count arrangements and selections correctly — permutations vs. combinations.
Common trap
Overcounting: treating a selection as ordered when order does not matter, or forgetting to divide by duplicates.
Details
Difficulty
sub-505
Type
PS
Category