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Question
Three coins are tossed. Find the probability of getting at least 1 head and 1 tail.
Sum
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Solution
Given: Three fair coins are tossed once. Assume each of the 23 = 8 outcomes is equally likely; the sample space is {HHH, HHT, HTH, THH, HTT, THT, TTH, TTT}.
Exclude the all-heads (HHH) and all-tails (TTT).
Remaining outcomes = 6.
Probability = `6/8`
= `3/4`
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Chapter 22: Probability - Exercise 22A [Page 505]
