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In a class, 20 students failed in a certain examination. If the no. of passed students is 80 and 1 student is selected at random, then the probability that the student has passed in the exam is:
  • a)
    0.8
  • b)
    0.6
  • c)
    0.2
  • d)
    0.4
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
In a class, 20 students failed in a certain examination. If the no. of...
P(student passed in the examination)

= 0.8
Free Test
Community Answer
In a class, 20 students failed in a certain examination. If the no. of...
Understanding the Problem
In this scenario, we have a class of students where some have passed and some have failed the examination.

Given Data
- Number of students who failed: 20
- Number of students who passed: 80
To find the total number of students in the class, we add the number of students who passed and failed:

Total Students = Passed Students + Failed Students
- Total Students = 80 (passed) + 20 (failed) = 100

Calculating Probability
Probability is defined as the number of favorable outcomes divided by the total number of outcomes.
In this case, the favorable outcome is selecting a student who has passed.

Favorable Outcomes
- Number of passed students = 80

Total Outcomes
- Total number of students = 100
Now, we can calculate the probability:

Probability (P) = Number of Passed Students / Total Students
- P = 80 / 100

Simplifying the Probability
To simplify 80/100:
- P = 0.8

Conclusion
Thus, the probability that a randomly selected student has passed the examination is:

0.8
Therefore, the correct answer is option 'A'.
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In a class, 20 students failed in a certain examination. If the no. of passed students is 80 and 1 student is selected at random, then the probability that the student has passed in the exam is:a)0.8b)0.6c)0.2d)0.4Correct answer is option 'A'. Can you explain this answer?
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In a class, 20 students failed in a certain examination. If the no. of passed students is 80 and 1 student is selected at random, then the probability that the student has passed in the exam is:a)0.8b)0.6c)0.2d)0.4Correct answer is option 'A'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about In a class, 20 students failed in a certain examination. If the no. of passed students is 80 and 1 student is selected at random, then the probability that the student has passed in the exam is:a)0.8b)0.6c)0.2d)0.4Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a class, 20 students failed in a certain examination. If the no. of passed students is 80 and 1 student is selected at random, then the probability that the student has passed in the exam is:a)0.8b)0.6c)0.2d)0.4Correct answer is option 'A'. Can you explain this answer?.
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