A factory has 140 machines, of which 30 are out of order (defective). If one machine is selected at random, what is the probability that it is defective?
- 3/12
- 3/14
- 7/16
- None of these
Explanation
Total number of machines = 140
Number of defective machines = 30
Probability = Number of defective machines / Total number of machines
Probability = 30 / 140
Probability = 3 / 14
Last verified on 11-07-2026
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