Statistics and Probability, NAPX-H3-CA05

Question

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Worked Solution

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Variant 0

DifficultyLevel

484

Question

Steph randomly picks one disk from a group of white and coloured disks, pictured below.



What is the probability Steph chooses a coloured disk?

Worked Solution
PP(Coloured disk) = Number of coloured disksTotal disks\dfrac{\text{Number of coloured disks}}{\text{Total disks}}
= 821\dfrac{8}{21}

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
question
Steph randomly picks one disk from a group of white and coloured disks, pictured below.
sm_img https://teacher.smartermaths.com.au/wp-content/uploads/2018/07/NAPX-H3-CA05.svg 300 indent3 vpad
What is the probability Steph chooses a coloured disk?
workedSolution
| | | | ------------- | ---------- | | $P$(Coloured disk) | \= $\dfrac{\text{Number of coloured disks}}{\text{Total disks}}$ | | | \= {{{correctAnswer}}} |
correctAnswer
$\dfrac{8}{21}$

Answers

Is Correct?Answer
x

13\dfrac{1}{3}

x

813\dfrac{8}{13}

✓

821\dfrac{8}{21}

x

1321\dfrac{13}{21}

Variant 1

DifficultyLevel

485

Question

Clare randomly picks one disk from a group of white and coloured disks, pictured below.



What is the probability Clare chooses a white disk?

Worked Solution
PP(White disk) = Number of white disksTotal disks\dfrac{\text{Number of white disks}}{\text{Total disks}}
= 1321\dfrac{13}{21}

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
question
Clare randomly picks one disk from a group of white and coloured disks, pictured below.
sm_img https://teacher.smartermaths.com.au/wp-content/uploads/2018/07/NAPX-H3-CA05.svg 300 indent3 vpad
What is the probability Clare chooses a white disk?
workedSolution
| | | | ------------- | ---------- | | $P$(White disk) | \= $\dfrac{\text{Number of white disks}}{\text{Total disks}}$ | | | \= {{{correctAnswer}}} |
correctAnswer
$\dfrac{13}{21}$

Answers

Is Correct?Answer
x

138\dfrac{13}{8}

x

23\dfrac{2}{3}

✓

1321\dfrac{13}{21}

x

813\dfrac{8}{13}

Tags