​You Are Given the Probability That an Event Will Not $P ( E ) = \frac { 28 } { 40 }$

Multiple Choice

​You are given the probability that an event will not happen.Find the probability that the event will happen. $P ( E ) = \frac { 28 } { 40 }$

A) ​ $\frac { 7 } { 10 }$
B) ​1
C) ​ $\frac { 3 } { 20 }$
D) ​0
E) ​ $\frac { 3 } { 10 }$