SumComb

How many of them to expect

Difficulty Starter · Set ychbie

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  1. 1
    A spinner lands on red 1 time in every 10. It is spun 30 times. How many reds would you expect?

  2. 2
    A spinner lands on red 1 time in every 3. It is spun 18 times. How many reds would you expect?

  3. 3
    A spinner lands on red 1 time in every 3. It is spun 12 times. How many reds would you expect?

  4. 4
    A spinner lands on red 1 time in every 4. It is spun 12 times. How many reds would you expect?

  5. 5
    A spinner lands on red 1 time in every 8. It is spun 40 times. How many reds would you expect?

  6. 6
    A spinner lands on red 1 time in every 3. It is spun 15 times. How many reds would you expect?

  7. 7
    A spinner lands on red 1 time in every 2. It is spun 6 times. How many reds would you expect?

  8. 8
    A spinner lands on red 1 time in every 4. It is spun 12 times. How many reds would you expect?

  9. 9
    A spinner lands on red 1 time in every 3. It is spun 12 times. How many reds would you expect?

  10. 10
    A spinner lands on red 1 time in every 8. It is spun 32 times. How many reds would you expect?

  11. 11
    A spinner lands on red 1 time in every 8. It is spun 32 times. How many reds would you expect?

  12. 12
    A spinner lands on red 1 time in every 3. It is spun 9 times. How many reds would you expect?

  13. 13
    A spinner lands on red 1 time in every 5. It is spun 15 times. How many reds would you expect?

  14. 14
    A spinner lands on red 1 time in every 10. It is spun 60 times. How many reds would you expect?

  15. 15
    A spinner lands on red 1 time in every 4. It is spun 20 times. How many reds would you expect?

  16. 16
    A spinner lands on red 1 time in every 6. It is spun 30 times. How many reds would you expect?

  17. 17
    A spinner lands on red 1 time in every 2. It is spun 8 times. How many reds would you expect?

  18. 18
    A spinner lands on red 1 time in every 2. It is spun 6 times. How many reds would you expect?

  19. 19
    A spinner lands on red 1 time in every 10. It is spun 30 times. How many reds would you expect?

  20. 20
    A spinner lands on red 1 time in every 3. It is spun 18 times. How many reds would you expect?

What is in this set

Drawing 240 problems from this page produced 28 different ones, 12% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 7 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.

Next to this

How many different combinations

Numbers 2–5.

How many different combinations

Numbers 2–5.

All of probability

5 skills in this topic, 15 sets between them.

Printing it

The printed sheet carries no menus and no advertising, and the answer key is on its own page.