56 -----8
x-----3
x=56*3/8=21
it can be done also like this:
c=km
56=k*8
k=56/8=7
c=7m , so c= 7*3=21
2/4? 4/8? .5? All mean 1/2. Also one half.
X is a normal random variable with a mean<span> of 120 and a </span>standard deviation<span> of 20. </span>Determine<span> the </span>probability<span> that X is greater than 135. Problem 3.</span>Find<span> a value of c so that P( -c < Z < c) = .45.</span>
Girl I struggle with this
