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In a box containing 100 bulbs, 10 bulbs...

In a box containing 100 bulbs, 10 bulbs are defective. Probability that out of a sample of 5 bulbs, none is defective, is

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Probablity of getting first non-defective bulb `= 90/100`
Probablity of getting second non-defective bulb `= 89/99`
Probablity of getting third non-defective bulb `= 88/98`
Probablity of getting fourth non-defective bulb `= 87/97`
Probablity of getting fifth non-defective bulb `= 86/96`
So, probablity of getting all non-defective bulbs in a sample of 5 bulbs =
`90/100**89/99**88/98**87/97**86/96`
Closest option to this is option `C`.
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