Grade 4 - Progress in Mathematics

Use the information given on page 254.

1. Suppose Ben picks 4 on the
   3rd t r y. What is the probability
   of his picking 0 on the 4th try?


2. If Ben picks 4 on the 3rd t r y, is it equally likely
   that he would pick 2 or 0 on the 4th try?


3. Suppose Rae started with A, B, C, D, E, and F. What would
   be the probability of her picking A on the 1st try?
   B on the 10th try? E on the 25th try? D on the 100th try?

Conduct a probability experiment.

4. Flip a coin 25 times. Record 5. Display the outcomes of your
   the outcomes in a tally chart. experiment in a bar graph.


5. What conclusion can you draw about the
   probability of the 26th flip landing on heads?

Suppose there are 2 red marbles and 2 black marbles in a bag.

7. What is the probability of picking red? black?


8. On the 1st try you pick a red marble and put it
   in your pocket. On the 2nd t r y, what is the
   probability of picking red? of picking black?

Make two spinners like the ones at the right. Decide which

player is EVEN and which is ODD. Spin both spinners

at the same time and find the sum. If the sum is

odd, ODD scores 1 point. If the sum is even, EVEN

scores 1 point. The winner is the first player to score

10 points. Switch roles and play again.

9. List all possible outcomes. Is this game fair or
   unfair? Explain your answer.

1 2

3 5

2 6

4 8

Remember: Ben’s experiment

was without replacement. Rae’s

experiment was with replacement.

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