- 1/7
- 7/15
- 1/21
- 1/20
- None of the above
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Option 4 : 1/20
We know that,
Event that Ram, P(r) and Suresh, P(s) both passing the exam individually are independent events
So the probability of both of them occurring together is P(r) × P(s) = P(c), where C is the event where both pass the exam.
Probability of Ram passing the exam P(r) = 1/5
Probability of Suresh passing the exam P(s) = 25% = 25/100 = 1/4
The probability of both Suresh and Ram passing the exam P(C) = P(r) × P(s) = (1/5) × (1/4) = 1/20
∴ the probability of both Suresh and Ram passing the exam is 1/20
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