Answer:
(a) 71.00%
(b) 63.00%
Step-by-step explanation:
No optional features = 0.29
One feature = 0.34
Two features = 0.37
(a) The probability that an order requests at least one optional feature is 100% minus the probability of an order requesting no optional features:

(b) The probability that an order does not request more than one optional feature is 100% minus the probability of an order requesting two optional features:

 
        
             
        
        
        
Answer:
I think 9 and 12 are paraellograms. the others are not paraellograms. dunno if im right. but I tried my best
Step-by-step explanation: