Chapter 5, Problem 5.10P

$\boxed{SOC}$ The average number of dropouts for a school district has been 305 per year with a standard deviation of 50. What is the probability that the number of dropouts next year will be

a. less than 250? __________

b. less than 300? ________

c. more than 350? _____________

d. more than 400? ____________

e. between 250 and 350? ___________

f. between 300 and 350? ___________

g. between 350 and 375? ___________