Let A be the event 'made by Apex and defective':
P(A) = 0.67 x 0.11 = 0.0737
Let B be the event 'made by B-ink and defective':
P(B) = 0.33 x 0.06 = 0.0198
Let C be the event 'made by Apex or B-ink and defective':
P(C) = P(A) + P(B) = 0.0737 + 0.0198 = 0.0935
P(defective and made by Apex) = 0.0737/0.0935 = 0.788
The answer is 0.788 or 78.8%.
I think the answer is 2 and -15. Because 2 times - 15 is -30 and 2 and -15 can be added to -1.
B. 46 feet because 132/12=11 and 12+12+11+11=46
(2x-1)×4=8x-4
I hope it helps ;)