Respuesta :
Step-by-step explanation:
This problem is related to binomial probability
Probability of getting head (success)p= 1/2
Probability of getting tail (failure )q=1/2
Total number of trials(n) = 8
number of success (r)= 3
Binomial probability P(r=3)
[tex]nCr(p)^{n-r}q^r[/tex]
Plug in the values in the formula
[tex]nCr(p)^{n-r}q^r\\8C3(\frac{1}{2} )^{8-3}\frac{1}{2} ^3\\ \frac{8!}{3!(8-3)!} (\frac{1}{2} )^8\\56 \cdot (\frac{1}{256} )\\0.21875[/tex]
To convert it into percentage , multiply by 100
0.21875 times 100= 21.9
Answer :
21.9%
Answer: 10.9%
Step-by-step explanation:
i just took the quiz
