Use the sample space defined by the experiment of tossing a fair coin four times. Express the event that there are exactly two tails as a subset of the sample space.
A){HHHH}
B){TTTT, TTTH, TTHT, THTT, HTTT}
C){HHTT, HTHT, THHT, HTTH, THTH, TTHH}
D){TTTT}
E){HHHH, HHHT, HHTH, HTHH, THHH}

Question

Quizplus · Accepted Answer

The event of getting exactly two tails can be represented by the set {HHTT, HTHT, THHT, HTTH, THTH, TTHH} which is option C. This set includes all possible outcomes in which exactly two tails occur in four coin tosses. The other options either do not have enough outcomes to represent all possible four-coin tosses or include outcomes that do not have exactly two tails.

Use the Sample Space Defined by the Experiment of Tossing