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Basic Probability Exploration

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Basic Probability Exploration

Kahu and Sione are helping organise a game trolley for a hospital ward. Use probability words and the diagrams to investigate what could happen. For questions about a fair spinner or fair die, imagine each section or number has an equal chance.

Put events in order

Use the number line to place each event where it belongs: cannot happen, unlikely, even chance, likely or certain. Write the letter above its position.

1.Events: A. A fair six-sided die lands on 8. B. A fair die lands on a number from 1 to 3. C. A fair four-colour spinner lands on one of its colours. D. A fair die lands on 6. Write A, B, C and D at the best matching points on the number line. Which event has an even chance?
00.250.50.751
2.At the hospital ward game trolley, a bag has 3 red counters and 1 blue counter. Georgia closes her eyes and picks one counter. Is picking red likely or unlikely? Is picking blue likely or unlikely?

Read the spinner

Each equal slice is one possible result. Study the spinner, then answer the questions.

3.The spinner has 4 equal slices: red, red, blue and yellow. Which colour is most likely? Which colour is least likely?
4.Georgia spins the spinner once. Choose the best chance word for landing on green: certain, likely, unlikely or impossible.
  • Certain
  • Likely
  • Unlikely
  • Impossible
5.What is the chance of landing on red compared with landing on blue? Complete: Red is as likely as blue.

Try a fair die

A fair die has the numbers 1, 2, 3, 4, 5 and 6. Think about all six possible results before you answer.

6.Which is more likely on one roll: getting an even number or getting a 5? Explain using the numbers on the die.
7.Kahu rolls the die 6 times. Must each number appear exactly once? Choose yes or no, then explain why.
8.A fair die is rolled once. Is getting a number less than 7 certain, more likely than not, less likely than not, or unable to happen?
  • Certain
  • More likely than not
  • Less likely than not
  • Unable to happen
9.Make your own fair spinner with 4 equal slices so that blue is likely but not certain. Write the colour on each slice.

3 printable pages

  • Basic Probability Exploration, page 1 of 3: Put events in order

    Page 1

  • Basic Probability Exploration, page 2 of 3: Read the spinner, Try a fair die

    Page 2

  • Basic Probability Exploration, page 3 of 3: 8. A fair die is rolled once. Is getting a number less than 7 certain, more likely than

    Page 3

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