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I: A box contains 20 screws , 5 of which...

I: A box contains 20 screws , 5 of which are defective. 2 screws are drawn at random. The probability of event that neither of the two screws is defective is `21//38`.
II: A box contains 5 black, 4 white and 6 red balls. 2 balls are drawn without replacement. The probability that the first will be first will be white and the second will be black is `4//21`.

A

Only I is true

B

Only II is true

C

Both I and II are true

D

neither I nor II true

Text Solution

Verified by Experts

The correct Answer is:
A
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