Question

A spinner has 4 equal sectors colored yellow, blue, green, and red. What is the probability of landing on a sector that is not red after spinning this spinner?

• A. $\frac{1}{4}$
• B. $\frac{2}{4}$
• C. $1$
• D. $\frac{3}{4}$

Answer 1

The correct option is D $\frac{3}{4}$


Sample space = {yellow, blue, red, green}

P(red) = Probability of landing on a sector that is red.

P(red) $=\frac{1}{4}$

$P\left(\overline{red}\right)$ = Probability of landing on a sector that is not red.

$P\left(\overline{red}\right)=1-P\left(red\right)$

$P\left(\overline{red}\right)=1-\frac{1}{4}$

$P\left(\overline{red}\right)=\frac{3}{4}$