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Which of the following is a discrete ran...

Which of the following is a discrete random variable?
I. The number of cars crossing a particular signal in a day.
II. The number of customers in a queue to buy train tickets at a moment.
III. The time taken to complete a telephone call.

A

I and II

B

II only.

C

III only

D

II and III

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The correct Answer is:
A
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