CPM Homework Banner

Home > CCG > Chapter 7 > Lesson 7.2.4 > Problem 7-88

7-88.

Kendrick is frantic. He remembers that several years ago he buried his Amazing Electron Ring in his little sister’s sandbox, but he cannot remember where. A few minutes ago he heard that someone is willing to pay for it. He has his shovel and is ready to dig. Homework Help ✎

pic

  1. The sandbox is rectangular, measuring 4 feet by 5 feet, as shown below. If Kendrick only has time to search in the 2 foot-square shaded region, what is the probability that he will find the ring?

    is what fraction of ?

diagram

  1. What is the probability that he will not find the ring? Explain how you found your answer.

  1. Kendrick decides instead to dig in the square region shaded below. Does this improve his chances for finding the ring? Why or why not?

    Write a probability for this diagram and compare it to your fraction from part (a).

diagram