Answer:
[tex]0.0197277[/tex]
Step-by-step explanation:
Consider the random variable X
Where X denotes the number of (success/having a correct answer)
in 10 identical and independent trials .
then
X follows the Binomial distribution with parameters
10 and p = p(success) = 1/4
[tex]p\left( X\geq 6\right) =\sum^{10}_{k=6} p\left( X=k\right)[/tex]
[tex]=\sum^{10}_{k=6} C^{k}_{10}\left( \frac{1}{4} \right)^{k} \left( \frac{3}{4} \right)^{10-k}[/tex]
[tex]=\frac{20686}{2^{20}} \\= 0.0197277[/tex]
