Answer:
0.05
Step-by-step explanation:
this is because the total probability always adds up to 1
1 ticket is 3$ 2 tickets are 6$ 3 tickets are 9$ and 4 tickets are 12$.
Step-by-step explanatiso
C. 4x + y = 21
(4 x 3) + 9
12 + 9 = 21