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Animal Shelter: Adoption Files and Supply Checks worksheet preview

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Animal Shelter: Adoption Files and Supply Checks

Build uniform models for shelter adoption-file and supply audits, calculate probabilities, and compare predictions with trial results.

Grade 7MathInteractive · Printable

Aligned to7.SP.C.7.a

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 14 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 7
Subject
Math
Question types
Fill in the blank, Multiple choice, Circle the answer, Short answer

About this worksheet

What students practice

  • Students build uniform probability models for randomly selected adoption files and supplies.
  • Students calculate event probabilities by counting equally likely outcomes.
  • Students compare model probabilities with observed frequencies and explain chance differences.

How to use

Have students use the adoption-file inventory for Sections 1 and 2. Discuss why a model probability and an observed relative frequency can differ.

Curriculum

Common Core standard covered

7.SP.C.7.a

Build a uniform probability model, where every outcome is equally likely, use it to find probabilities, and compare probabilities from a model to observed frequencies and explain differences.

Preview

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Name Date

Animal Shelter: Adoption Files and Supply Checks

Build equal-chance models and compare them with audit results.

1. Model an Adoption-File Audit

The shelter audits past adoption files, not animals waiting for adoption. Use the inventory below. Give numerical probabilities as fractions.

Adoption-File Inventory
File numberAnimal adoptedTake-home kit
1CatStandard
2CatStandard
3CatStandard
4CatStandard
5CatStandard
6DogLarge
7DogLarge
8DogLarge
9DogLarge
10RabbitStandard
11RabbitStandard
12RabbitStandard
1.
Eli proposes choosing cat, dog, or rabbit with equal probability, then choosing equally among that animal's files. Why would this NOT give all 12 individual files equal probabilities?
  • A. Each rabbit file would be more likely than each cat file.
  • B. Each cat file would be more likely than each rabbit file.
  • C. Each individual file would still have probability 1/12.
  • D. Each dog file would be more likely than each rabbit file.
2.
Instead, Maya uses a random-number generator that chooses each integer from 1 through 24 with equal probability. She assigns the same number of integers to each of the 12 files, using every integer exactly once.

How many integers should she assign to each file?   integers
What probability does this give each individual file?  

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