40% of the memberships sold by Gym A were gold memberships. 25% of the memberships sold by Gym B were gold memberships. Which statement must be true?
If both gyms sold 80 total memberships, Gym A sold 12 more gold memberships.
If both gyms sold the same number of memberships, Gym A sold 15 more gold memberships.
Gym A sold more gold memberships than Gym B did.
If Gym B sold 50 memberships, 25 would be gold memberships