Question

A coin is tossed three times. Determine the probability of two or more heads.

1. 3 over 4

2. 1 half

3. 1 fourth

4. 3 over 8

Answer 1

Answer:

3. 1/2

Step-by-step explanation:

$P(X=x)=p^{x} (1-p)^{n-x}$

X= number of heads

p= probability of heads (one half because it is a coin- either heads or tails)

n= number of times coin is tossed

$P(X\geq 2)=0.5^{2}(1-0.5)^{3-2}+0.5^{3} (1-0.5)^{3-3}$

$P(X\geq 2)=0.5$