Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Probability

Question:
If a coin is tossed three times, then the probability of getting at least one tail is
Options:
\(\frac{1}{3}\)
\(\frac{1}{8}\)
\(\frac{3}{8}\)
\(\frac{7}{8}\)
Correct Answer:
\(\frac{7}{8}\)
Explanation:
\(\begin{aligned}P(\text{ Getting at least one tail in three tosses })&=1-P(\text{ getting head in all three times })\\ &=1-\frac{1}{8}\\ &=\frac{7}{8}\end{aligned}\)