Answer
$\frac{53}{142}$
Work Step by Step
The probability that an event E will not occur is equal to 1 minus the probability that it will occur.
P(not E)= 1 - P(E)
E: is in the Air Force or the Marines
A = Neither in the Air Force nor the Marines
P(is in the Air Force or the Marines.) = 1 - P( Neither in Air force nor in Marines)
P( Neither in Air force nor in Marines) = $\frac{890000}{1420000}$ = $\frac{89}{142}$
P(is in the Air Force or the Marines) = 1 - $\frac{89}{142}$
= $\frac{142 - 89}{142}$ = $\frac{53}{142}$
