Claire flips a coin 4 times. Using the table, what is the probability that the coin will show tails at most once? Number of Tails 0 1 2 3 4 Probability 0 point 0 6 0 point 2 5 0 point 3 8 0 point 2 5 0 point 0 6
Answer
A
0 point 2 5
B
0 point 3 1
C
0 point 6 9
D
0 point 0 6
Explanation
“At most once” means the coin shows tails either 0 times or 1 time. Add those probabilities: 0.06 + 0.25 = 0.31, so the probability is 0.31 (choice B).
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