SAT Math Question of the Day

Math Category: Probability:

Q: After Marge baked an apple pie, she discovered her ring was missing. It was baked into the pie! The pie was cut into 8 pieces. She gave 1 piece of pie to each of her 3 sons to eat, but the ring was still not found. When she gives another piece of pie to her husband, what is the probability that the ring will be in that piece of pie?

  1. 1/4
  2. 1/5
  3. 1/6
  4. 1/7
  5. 1/8

UNANSWERED.

The correct answer is B.

A: The answer is 1/5
Probability is outcomes wanted / all outcomes.
After the 3 sons eat 3 of the 8 pieces of pie, only 5 pieces are left.
The chance that the next piece of pie has the ring in it is 1/5.