Question

A game is played with a fair spinner. 1,3,4,7 The spinner is spun twice and the two numbers are added to make a score. complete the table to show the possible scores.

First spin
Second spin
You win if your score is an even number. Kesha says only 1 of the 4 numbers on the spinner is an even number so I am unlikely to win?
is she correct?
Give a reason for your answer

Answer 1

We’ll use probability to answer this question.

Probability: Number of even numbers / All numbers added together.

Odd numbers: 1,3,7
Even numbers: 4

All numbers added together (amount of numbers not the numbers itself!) = 4

Amount of even numbers = 1

Probability of getting an even number is 1/4

Answer: Yes she is correct, the probability of getting an even number is 1/4.