Question

34. For a certain normal variate X, the mean is 12 and S.D. is 4.
Find P(X >=20) .
[Area under the normal curve from z = 0 to z = 2 is 0.4772]
(a) 0.5238
(b) 0.0472
(c) 0.7272
(d) 0.0228​

Answer 1

Answer:

0.0228 is the correct answer

Answer 2

First step. 20-12/4

so, =2