Free Practice Question
PS · Problem Solving
605-655
Probability
In Alex's city, the chance of rain on Wednesday is 0.4. Additionally, the likelihood that Alex's instructor will assign a surprise test on Wednesday is 0.1. Assuming these events are independent, what is the probability that at least one of these events happens?
Answer Choices
Correct answer marked belowA
0.36
B
0.4
0.46
Correct
D
0.54
E
0.6
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Explanation
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Official Explanation
Official
The probability of rain in Alex's city on Wednesday is 0.4, and the probability that Alex's instructor will give him a surprise test on Wednesday is 0.1. Since these events are independent, we can calculate the probability that at least one of them…
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Comments
3
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М
МихаилApr 10, 2025
Thank you very much!
B
BraedonAug 1, 2024
Love how you solved this
S
SuryanshooApr 7, 2025
thankss
What this question tests
What it tests
Your ability to compute probabilities of single and compound events, including 'at least one' questions.
Common trap
Forgetting to use the complement for 'at least one', or treating dependent events as independent.
Details
Difficulty
605-655
Type
PS
Category