Suppose that six coins are tossed at the same time. How many possible outcomes are there?
There is more than one way to answer this question.
Do you consider the following two outcomes different?
We assume that each of the six coin tosses is independent of each other toss which means that the outcome of one toss does not affect any other toss.
If the tosses are independent, then we can instead toss a single coin six times in a row and record the outcomes, in order.
Tossing one coin repeatedly will not change the probability that any particular toss will come up heads or tails.