Question

What is the probability of flipping a coin four times, with the coin landing on heads all four times and rolling a 1, 2, or 4 on a die

Answer 1

The probability of getting heads at least once = 1 - the probability of getting tails all 4 times.
Ans = 1 - (1/2)(1/2)(1/2)(1/2) = 1 - (1/16) = 15/16