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In a packet of 500 pens, 50 are found to be defective. A pen is selected at random. Find the probability that it is non defective.
- a)8/9
- b)7/8
- c)9/10
- d)2/3
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
In a packet of 500 pens, 50 are found to be defective. A pen is select...
Given, total number of pens (n) = 500
Number of defective pens (d) = 50
Number of non-defective pens (nd) = n - d = 500 - 50 = 450
We need to find the probability of selecting a non-defective pen at random.
Probability of selecting a non-defective pen (P(nd)) = nd/n = 450/500 = 9/10
Therefore, the correct answer is option C) 9/10.
Explanation:
- Given data: n = 500, d = 50, nd = n - d = 450
- Probability is the ratio of the number of favorable outcomes to the total number of possible outcomes.
- Favorable outcome in this case is selecting a non-defective pen.
- Total possible outcomes is the total number of pens.
- Probability of selecting a non-defective pen at random is P(nd) = nd/n.
- Substituting the values, we get P(nd) = 450/500 = 9/10.
- Therefore, the correct answer is option C) 9/10.
Number of defective pens (d) = 50
Number of non-defective pens (nd) = n - d = 500 - 50 = 450
We need to find the probability of selecting a non-defective pen at random.
Probability of selecting a non-defective pen (P(nd)) = nd/n = 450/500 = 9/10
Therefore, the correct answer is option C) 9/10.
Explanation:
- Given data: n = 500, d = 50, nd = n - d = 450
- Probability is the ratio of the number of favorable outcomes to the total number of possible outcomes.
- Favorable outcome in this case is selecting a non-defective pen.
- Total possible outcomes is the total number of pens.
- Probability of selecting a non-defective pen at random is P(nd) = nd/n.
- Substituting the values, we get P(nd) = 450/500 = 9/10.
- Therefore, the correct answer is option C) 9/10.
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Community Answer
In a packet of 500 pens, 50 are found to be defective. A pen is select...
The pen which is non defective are
500-50= 450
so the probability is
450/500 = 9/10
500-50= 450
so the probability is
450/500 = 9/10
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In a packet of 500 pens, 50 are found to be defective. A pen is selected at random. Find the probability that it is non defective.a)8/9b)7/8c)9/10d)2/3Correct answer is option 'C'. Can you explain this answer?
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