Latest IBM Aptitude Question SOLUTION: A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective is A. 4/19

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(#M40005598) IBM Numerical Ability question Probability Keep an EYE

A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective is
A. 4/19 B. 7/19
C. 12/19 D. 21/95

Asked In IBM (12 years ago)

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