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A coin is tossed two times. Find the probability of getting at most one head.

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Answer.     [3/4]
Solution.     Probability; Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one
  Total cases  = 4 (HH, TT, HT, TH)
Cases of at most 1 head = HT, TH, TT
Probability = \frac{Number\, of\, favourable\ cases }{Total\, number\, of\, cases}

Probability of getting at most 1 head = \frac{3}{4}

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