Answer:
C
Step-by-step explanation:
(a) If
are mutually exclusive, then

so we have

(b) If
are mutually independent, then




so that



Answer:
m∡ZA = 51°
m∡ZB = 39°
Step-by-step explanation:
∡ZB = 'b'
∡ZA = '12 + b'
b + 12 + b = 90
2b + 12 = 90
2b = 78
b = 39
12 + 39 = 51
Just do 47+118 and it equals 165. Jorge started with 165 tickets.