Asked by Laura
A coin is biased so that the probability of obtaining a head is 2/3. The coin is tossed four times. Find the probability of obtaining exactly two heads.
Answers
Answered by
Scott
this is a binary expansion
(h + t)⁴
the term you want is...6 h² t²
6 * (2/3)² * (1/3)² = 24/81 = 8/27
(h + t)⁴
the term you want is...6 h² t²
6 * (2/3)² * (1/3)² = 24/81 = 8/27
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