Probability of a man hitting a target is 110.

Question

Probability of a man hitting a target is $\dfrac{1}{10}$. Find the least number of shots so that the probability of hitting at least once exceeds $\dfrac14$.

Answer: 3

Accepted Answer

$$1-(0.9)^n > \frac14 \implies (0.9)^n<0.75 \implies n_{\min}=3$$

Solutions · 1