Answer:
Step-by-step explanation:
19.6<x<30.5 = p(x<30.5)-p(x<19.6)
p(x<30.5)= (30.5-23.2)/2.7= 2.7037= 2.7 (using a normal table) this has a probabilty of .9965
p(x<19.6)=(19.6-23.2)/2.7= -1.3333= -1.33 (using a normal table) this has a probability of (1-.9082)= .0918
.9965-.0918= .9047
