1.find the mean if the z score is -0.833,variance =3,and X=20?

a. 0.95
b. 22.5
c. 24
d. 26.5


2.what is the area of the right of z = -1.74?
a. 095907
b. 0.04093
c. 0.17650
d. 0.82350


3.What is the area between z =-0.89 and z = 3.25?
a. 61.08
b. 79.32
c. 88.65
d. 81.27

3.​