Q. The probability of having at least one tail in 4 throws with a coin, is
A) $\frac{15}{16}$
B) $\frac{1}{16}$
C) $\frac{1}{4}$
D) 1
Explanation
(a)
Probability of no tail in four throws $= \frac{1}{2} \bullet \frac{1}{2} \bullet \frac{1}{2} \bullet \frac{1}{2} = \frac{1}{16}$
Probability of atleast one tail $= 1 - \frac{1}{16} = \frac{15}{16}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.