Which of the following events is independent?
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Drawing two cards with replacement from a pack of 52 cards and getting an ace
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Drawing two cards with replacement from 52 cards to first get a king then an ace.
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Tossing of two coins simultaneously twice to get 4 heads.
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Tossing of a coin and if the result is head, then rolling of a dice to get an even number.
Independent events are those where the outcome of one does not affect the probability of the other. Tossing two coins simultaneously twice consists of separate actions where the result of the first pair of tosses has no mathematical impact on the result of the second pair of tosses. Because the second stage is not restricted by the first stage, this represents independent events. The correct choice is tossing of two coins simultaneously twice to get 4 heads.