The probability the pitch over the plate is a ball is 5:10. (5 balls and 10 strikes over the plate) should be written as 5:15 or 1:3 so this one is inaccurate.
Answer:
p=18
Step-by-step explanation:
p+12=30
subtract 12 from each side
p=18
42000/12=3500 assuming he doesn't buy anything else like food clothes exc.