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There are 600 electric bulbs in a box out of which 20 bulbs are defective. If one bulb is chosen at random from the box. The probability that the chosen bulb is defective is:

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119

120

130

2930

answer is C.

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Detailed Solution

Given that 20 bulbs are defective out of 600 blubs present in a box.
Number of defective bulbs = 20
And, total number of outcome = 600
Now, the probability that the chosen bulb is defective is,

= Number of defective bulbs Total number of outcomes = 20600

= 130

The probability is

130

.
Hence, option 3 is correct.

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