AnswersCommon Core Math 7 - MA3107 CRSimulations to Estimate Probabilities — Unit testQuestion 4
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Simulations to Estimate Probabilities — Unit test

Question 4 • Common Core Math 7 - MA3107 CR

A set of cards contains the numbers 1 through 20. Mathieu chooses a card at random, records the number of the card, and then returns the card to the set. He conducts 200 trials of this event. Based on the theoretical probability, how many times can Mathieu expect to choose a multiple of 5?

Answer
A
10
B
20
C
40
D
50

Explanation

There are 4 multiples of 5 from 1 through 20: 5, 10, 15, and 20. The probability is 4/20 = 1/5, so in 200 trials Mathieu can expect 200 × 1/5 = 40 times to choose a multiple of 5. The correct choice is 40.

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