Multiple choice

A bag contains coloured discs. Riya selects a disc at random, notes its colour, and then replaces it. She does this 500 times and her results are shown below: Blue Green Red Yellow White 8 85 200 115 92 Riya hands the bag to Peter, who is going to select one disc from the bag. Based on Riya's experiment, find the experimental probability that Peter selects a red disc.

  1. 0.4

  2. 0.6

  3. 0.2

  4. 0.14

  5. NA
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A Correct answer
Explanation

Experimental probability = (Number of times event occurred) / (Total number of trials). Red occurred 200 times out of 500 trials. 200/500 = 2/5 = 0.4.

AI explanation

The experimental probability of an event is the ratio of successful trials to the total number of trials. Out of 500 trials, a red disc was selected 200 times. This yields a probability of 200 divided by 500, which simplifies to 0.4.

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