Unit 4 · Statistics and Probability
4×$5 · 2×$10 · 2×$20 — Which Statements Are True?
Lesson 5 of 6
About this lesson
Shamira has 4×$5, 2×$10, and 2×$20 notes — 8 total. Three statements are given. Statement 1 (more likely $5 than $20) and Statement 2 (equally likely $5 or not-$5) are both true because exactly half the notes are $5. Statement 3 (certain to pick >$5) is false — there's a 50% chance of picking a $5 note.
Chapters
Question
Shamira has these notes in her purse:
| - four $5 notes |
| - two $10 notes |
| - two $20 notes |
She takes a note from her purse without looking.
Which of these statements is/are correct?
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She is more likely to take a $5 note than a $20 note.
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She is equally likely to take a $5 note or not to take a $5 note.
-
It is certain that she takes a note worth more than $5.
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