Question

Leila spun a spinner a total of 1000 times and recorded the number of times it had landed on pink after different numbers of spins. Her results are shown below. Work out the best estimate for the probability of the spinner landing on pink. Give your answer as a decimal. Number of spins Frequency of pink 10 50 100 500 1000 3 12 21 147 289​

Answer 1

The probability that a spinner lands on pink is 0.289

Using the parameters given;

• Number of spins = 1000
• Frequency of pink = 289

The probability of obtaining pink is ;

• Frequency of pink / Number of spins

Now we have ;

• P(pink on 1000) = 289 / 1000 = 0.289

Hence, the probability of landing on pink is 0.289