In a set of cards, each card has an alphabet on one side, and a number on the other. There is an assumption that if a vowel is on one side, an odd number must be on the other. Four cards are given, showing E, 4, 3 and J. What is the order of the minimum turns of cards in order to verify this assumption?
To answer the question above, which of the followings should be applied?
Select one:
a. Thinking mathematically
b. Do the probability
c. Consider the opposite
d. Think in combinations