A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at Sy random from this box. The probability that at least one of these is defective is__

1. A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at Sy random from this box. The probability that at least one of these is defective is__

[Officer (Cash) 2018 [MCQ] : 2018]

1. 7/19

2. 6/19

3. 5/19

4. 3/19

Answer

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