Is number 10 right? of it isnt plz tell me !

Answer this question, only if you know the answer. 30 points and brainliest!

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9