CUET · MATHS · PYQ PAPER 2023
In a box containing 100 bulbs, 10 are defective.
The probability that out of a sample of 5 bulbs none is defective is:
- A \(10^{-1}\)
- B \(\left(\frac{1}{2}\right)^5\)
- C \(\left(\frac{9}{10}\right)^5\)
- D \(\frac{9}{10}\)
Answer & Solution
Correct Answer
(C) \(\left(\frac{9}{10}\right)^5\)
Step-by-step Solution
Detailed explanation
Non-defective bulbs = \(100 - 10 = 90\) Probability of one non-defective bulb = \(\frac{90}{100} = \frac{9}{10}\) Probability of 5 non-defective bulbs = \(\left(\frac{9}{10}\right)^5\)
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