Answer:
A) The probability that the event will occur
B)The probability that the event will not occur = 
Step-by-step explanation:
We are given that The odds of event occurring are 1:6.
So, Number of successful events = 1
Number of unsuccessful events = 6
So, Total events = 6+1=7
a)the probability that the event will occur=
The probability that the event will occur
b)The probability that the event will not occur =
The probability that the event will not occur = 