Free Practice Question
PS · Problem Solving
505-555
Probability
In a class, the roll numbers of students range from 150 to 249 (both inclusive). If a teacher randomly selects one student, what is the probability that the selected student's roll number is divisible by 4?
Answer Choices
Correct answer marked belowA
1/5
B
23/100
25/100
Correct
D
2/5
E
None of these
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Explanation
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Official Explanation
Official
To find the numerator, we need to count all the numbers divisible by 4 between 150 and 249, inclusive. The numbers are 152, 156, 160, ...,…
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Comments
2
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C
CharminglyMar 4, 2024
greatt question!
A
AnshulSep 8, 2024
Thanks for sharingThank you for sharing!!thanks for sharing
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
505-555
Type
PS
Category