Two coins are tossed simultaneously. Probability of getting at least one Head is:

Two coins are tossed simultaneously. Probability of getting at least one Head is:
  1. $\dfrac{1}{4}$
  2. $\dfrac{1}{2}$
  3. $\dfrac{3}{4}$
  4. $1$

Solution

Sample space $= \{HH, HT, TH, TT\}$. At least one $H$: $\{HH, HT, TH\}$. $P = \dfrac{3}{4}$.

Asked in: IMO

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