It is known that 10% of adults can pass a fitness test. What is the probability that 17 adults in a sample of 100 adults pass this fitness test?
A. 0.9900
B. 0.0106
C. 0.1000
D. 0.0343

Respuesta :

Answer: Option B

Step-by-step explanation:

We can use the binomial formula to solve this problem.

[tex]P(X) = \frac{n!}{x!(n-x)!}*p^x(1-p)^{n-x}[/tex]

Where p is the probability of success, n is the sample size and x is the number of successes expected.

Note that in this case

[tex]p = 0.10[/tex] (probability of an adult passing the fitness test)

[tex]n = 100[/tex]

[tex]x = 17[/tex]

Then we calculate the probability

[tex]P(X=17) = \frac{100!}{17!(100-17)!}*0.1^{17}(1-0.1)^{100-17}[/tex]

[tex]P=0.0106[/tex]