Jeżeli a b ⸦ ω i p (a ∩b)= 3/5 p (b′) = 1/4 oraz p(a) = 0,5 to prawdopodobieństwo sumy zdarzeń jest równe: A. 17/20
B. 13/20
C. 2/5
D. 3/4

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

Find the values of y: 3y^3(y^2+ 2/3y)=0

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2