Three unbiased coins are tossed. What is the probability of getting at most two

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Three unbiased coins are tossed. What is the probability of getting at most two heads?

Options:

A . $$\frac{{3}}{{4}}$$

B . $$\frac{{1}}{{4}}$$

C . $$\frac{{3}}{{8}}$$

D . $$\frac{{7}}{{8}}$$

Answer: Option D

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