How many outcomes are possible in the flip of four coins?

4 heads, 4 tails, 3 heads one tails, one heads 3 tails, 2 heads 2 tails
so 5 outcomes I believe

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.