how many different possible outcomes are there if you flip two coins?

Explanation:

Step1: List outcomes for first coin

Each coin has 2 outcomes (heads - H or tails - T). For the first coin, it can be H or T.

Step2: Combine with second - coin outcomes

When the first coin is H, the second coin can be H or T (giving HH and HT). When the first coin is T, the second coin can be H or T (giving TH and TT).

Answer:

4