I think the answer is £53, sorry if I am wrong.
You should choose plumber B
Answer:
A mutually exclusive event is when there are two events that can occur, such as flipping a coin, either it will be a head or a tail. Hence, both the events here are mutually exclusive.
An independent event is termed as an event that occurs without being affected by other events. The happening of one event has nothing to do with the happening of the other and there is no cause-effect between the two.
Z×3=x
I used that because we dont know how much she bakes each day and that would be multiplied by 3 which would equal somthing
As 300 tickets are sold , the probability of being a winner is = 
The prize value is $64 or 
= 0.213
The cost of ticket you paid = $4
Hence, the expected value of one ticket = 0.213-4 = -3.787 or rounding off we get -3.79
