Which of the following is not a random experiment?

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Tossing a coin

Rolling a die

Choosing a card from a deck of 52 cards

Throwing a stone from a roof of a building

answer is D.

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Detailed Solution

We know that an event associated to a random experiment is the collection of some outcomes of the experiment.
A random experiment is one in which the outcome of a trial cannot be predicted in advance.
So, random experiments include tossing a coin, rolling a die, and picking a card from a deck of 52 cards.
But a stone being thrown from a building's roof is not a random experiment.
Hence, option (4) is correct.

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