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SSC Pure Mathematics QUESTION #11224
Question 1
A coin is tossed 4 times. The probability that at least one head occurs is:
  • $\dfrac{1}{16}$
  • $\dfrac{4}{16}$
  • $\dfrac{12}{16}$
  • $\dfrac{15}{16}$✔️
Correct Answer Explanation
$P(\text{at least one head}) = 1 - P(\text{no heads}) = 1 - \left(\dfrac{1}{2}\right)^4 = 1 - \dfrac{1}{16} = \dfrac{15}{16}$.