Answer:
Choice B: 42 units
Step-by-step explanation:
5x30= 150
1 in 7
Your one-digit choices: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
But they're nonzero, so: 1, 2, 3, 4, 5, 6, 7, 8, 9.
But they can't be repeated and 9 and 8 are used, so: 1, 2, 3, 4, 5, 6, 7.
Only 7 numbers left, so chances are, 1 in 7.
A=20 B=23 C=17,19,23
A=20
B=23
C=17,19,23
