I don't know if I understand the question but I think it is 15
Answer:
Step-by-step explanation:
Hello, please consider the following.
a)

b)

Thank you.
25x^2 = 16
divide each side by 25
x^2 = 16/25
take the square root of each side
sqrt (x^2) = +- sqrt(16/25)
x = +- sqrt(16)/sqrt(25)
x = +- 4/5
x = 4/5, - 4/5
Answer:
Since it is the case of independent the answer will be 6/22