Free Practice Question
PS · Problem Solving
sub-505
Combinations
Maria, residing in Town T, intends to explore 4 distinct locations, A, B, C, and D. She aims to visit each location exactly once before returning to Town T. In how many unique sequences can she visit the 4 locations?
Answer Choices
Correct answer marked belowA
12
B
18
24
Correct
D
30
E
36
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Explanation
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Official Explanation
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Maria can visit the locations in any sequence. The number of ways to arrange…
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Comments
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P
PietroSep 2, 2024
thanks for taking time to upload it!
I
InêsMar 11, 2024
Amazing
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