Here the answer is 19/35
Step-by-step explanation:

We will apply BODMAS rule
In this rule multiplication comes before add and subtraction
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= 
= 
= 
= 
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Events are mutually exclusive only if they cannot both be true.
Only C is alright.
4 is a multiple of two so it can't be right.
Same logic works for B.
And then 2 is prime so then D is out too.
Answer:
False B=1
Step-by-step explanation:
10b+18=28
Subtract 18 both sides.
10b=10
Divide 10 both sides.
b=1