1. what is the probability of getting 3 tails, when tossing a coin 4 times? __%
2. what is the probability of getting 4 heads, when tossing a coin 6 times? __%

1. The probability is 1/4
2. The probability is 3/4

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.