Question

A fair coin is tossed three times. What is P(tossing three tails)?

one eighth
one fourth
three eighths
one half

Answer 1

Answer: I believe you mean tossing 2 tails, for that the answer would be C 3/8

Answer 2

(a) 1/8

Explanation:

You want to know the probability of tossing 3 tails when a coin is tossed 3 times.

Outcomes

There are 8 possible outcomes from 3 coin tosses:

HHH, HHT, HTT, HTH, TTH, THH, THT, TTT

Of these, one is 3 tails. The probability of that outcome is the ratio of the number of times that outcome occurs to the total number of outcomes:

P(3 tails) = 1/8 . . . . matching choice A

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