Probability of Independent Experiments
Combinatorics · proposed by @vipproaccout
The probability of success in performing an experiment $T$ is $0.4$. A group of $9$ students independently perform experiment $T$. Find the probability that at most $7$ students successfully perform the experiment, expressed as a percentage.
A$99.62\%$
B$94.22\%$
C$90\%$
D$77.11\%$
E$69.23\%$