Question

A spinner with 8 equally sized slices is shown below. ( slices are red, 4 are blue,3 and 1 is yellow.) The dial is spun and stops on a slice at random. What is the probability that the dial stops on a red or blue slice?Write your answer as a fraction or a whole number.

Answer 1

ANSWER

$\frac{7}{8}$

EXPLANATION

Given that total slices are 8

Number of red and blue slices;

$\begin{gathered} red=4 \\ blue=3 \\ n(B&R)=4+3=7 \end{gathered}$

Hence, the probability that the dial stops on a red or blue slice is;

$\begin{gathered} P(R&B)=\frac{n(R&B)}{Total\text{ number}} \\ =\frac{7}{8} \end{gathered}$