The size of a manufactured part is a normal random variable with mean 100 and variance 25. If the size is between 95 and 110, the parts can be sold at a profit of $50 each. If the size exceeds 110, the part must be reworked and a net profit of $10 is made per part. A part whose size is less than 95 must be scrapped at a loss of $20. What is the expected profit for this process?

Is 8.50 an answer or no? ?

Ithink the answer is c

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )