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A student has a 70% chance of passing an exam. If he takes the exam twice, what is the probability that he passes at least once?

Practice Questions

1 question
Q1
A student has a 70% chance of passing an exam. If he takes the exam twice, what is the probability that he passes at least once?
  1. 0.49
  2. 0.91
  3. 0.51
  4. 0.70

Questions & Step-by-step Solutions

1 item
Q
Q: A student has a 70% chance of passing an exam. If he takes the exam twice, what is the probability that he passes at least once?
Solution: The probability of passing at least once is 1 - (0.3^2) = 1 - 0.09 = 0.91.
Steps: 0

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