Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 McGraw Hill Glencoe - Answer Keys
Chapter 9: Probability; Lesson 2: Theoretical and Experimental Probability


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Extra Practice

For Exercises 9 and 10, find each experimental probability. Then compare the experimental probability to its theoretical probability. If the probabilities are not close,  explain a possible reason for the discrepancy.

  • Question 10 (request help)

    A heart is randomly chosen 7 out of 12 times from the cards shown.
  • Type below:

Solve.

  • Question 11 (request help)

    Last month, customers at a gift shop bought 40 birthday cards, 19 congratulations cards, 20 holiday cards, and 21 thank you cards. Suppose 125 customers buy greeting cards next month. How many would you expect to buy a birthday card?
  •    customers
  • Question 12 (request help)

    Use the graph below.

    a. What is the probability that a mother received a gift of flowers or plants? Write the probability as a fraction in simplest form.
  • Question 12 (request help)

    b. Suppose 400 mothers will receive a gift. Predict how many will receive flowers or plants.
  •    mothers

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