Probability, NAPX-p167455v03

Question

A bag contains different coloured balls.

It contains 4 red balls, 8 green balls, 3 pink balls, 6 grey balls and 11 yellow balls.

Nathalie picks a ball from the bag without looking.

What is the chance that she draws a grey ball?

Worked Solution
PP(Grey ball) = Number of grey ballsTotal number of balls\dfrac{\text{Number of grey balls}}{\text{Total number of balls}}
= 64+8+3+6+11\dfrac{6}{4+8+3+6+11}
= 632\dfrac{6}{32}
= {{{correctAnswer}}}

Variant 0

DifficultyLevel

562

Question

A bag contains different coloured balls.

It contains 4 red balls, 8 green balls, 3 pink balls, 6 grey balls and 11 yellow balls.

Nathalie picks a ball from the bag without looking.

What is the chance that she draws a grey ball?

Worked Solution
PP(Grey ball) = Number of grey ballsTotal number of balls\dfrac{\text{Number of grey balls}}{\text{Total number of balls}}
= 64+8+3+6+11\dfrac{6}{4+8+3+6+11}
= 632\dfrac{6}{32}
= 316\dfrac{3}{16}

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
correctAnswer
$\dfrac{3}{16}$

Answers

Is Correct?Answer
x

15\dfrac{1}{5}

✓

316\dfrac{3}{16}

x

631\dfrac{6}{31}

x

413\dfrac{4}{13}

Tags