Question

If you flip a coin 3 times what is the probability of getting at least 2 tails

Answer 1

$|\Omega|=2^3=8\\ |A|=4\\\\ P(A)=\dfrac{4}{8}=\dfrac{1}{2}=50\%$

Answer 2

If you flipped a coin 3 times:{

Total number of possible outcomes = 2³ = 8

Total number of outcomes with at least 2 tails = 4
{HTT , THT, TTH, TTT}

P(at least 2 tails ) = 4/8 = 1/2

Answer: 1/2