Answer:
15 B
16 C
17 A
Step-by-step explanation:
Answer would be 3/50
13) 1,11 14) 1,2,11,22 15) 1, 2, 4, 7, 14, 28 16) 1, 2, 4, 8, 16, 32 17) 1, 2, 3, 6, 7, 14, 21, 42