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Consider a software program that is artificially seeded with 100 faults. While testing this program, 159 faults are detected, out of which 75 faults are from those artificially seeded faults. Assuming that both real and seeded faults are of same nature and have same distribution, the estimated number of undetected real faults is _______.
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Answer:28

Explanation:

75% of faults are detected because 75 artificially seeded faults are detected out of 100.

No of detected real faults = 159-75=84

Hence no of real faults = (84)*100/75

=112

Therefore undetected real faults = 112-84 = 28.
According to ace academy solution:175
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