Question

The spinner below is spun once.
What is the probability that the spinner will land on 5 or 7?
A.25%
B.16%
C.8%
D.12 ½%

Answer 1

The probability that the spinner will land on 5 or 7 if the spinner is spun once is 1/4

How to determine the probability that the spinner will land on 5 or 7 if the spinner is spun once?

The sample space of the spinner is

S = {1, 2, 3, 4, 5, 6, 7, 8}

So, the sample size is

Size = 8

On the spinner, we have

n(5) = 1

n(7) = 1

The probability that the spinner will land on 5 or 7 if the spinner is spun once is calculated as:

P = P(5) + P(6)

This gives

P = 1/8 + 1/8

Evaluate

P =2/8

Simplify

P = 1/4

Hence, the probability that the spinner will land on 5 or 7 if the spinner is spun once is 1/4

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