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

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A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at ...

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One of the ancient centres of the civilization in Nigeria was ____________

Given that \(\frac{1}{8^{2y - 3y}} = 2^{y + 2}\).

Correct Answer: B

Explanation

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