Free Practice Question
PS · Problem Solving
505-555
Combinations
A coin has heads on one side and tails on the other, giving it a probability of 1/2 to land on heads. If this coin is flipped 6 times, how many distinct outcomes can occur if the final flip must be heads? Distinct outcomes are those that do not have the same results in the same order.
Answer Choices
Correct answer marked belowA
20
B
21
C
22
D
26
32
Correct
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Comments
2
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B
BelénFeb 16, 2025
can you explain more?
A
AshishJan 17, 2025
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
505-555
Type
PS
Category