Maria's copy of Probability of picking a particular colour ball from a bag

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Maria Aneiros 5 years, 10 months ago

Created this as a copy of Probability of picking a particular colour ball from a bag.

Name	Status	Author	Last Modified
Basic Probability Questions	Should not be used	Elliott Fletcher	20/11/2019 14:33
Choose the probability of getting certain scores on a die	Ready to use	Christian Lawson-Perfect	20/11/2019 14:34
Probability of flipping a coin and getting a tails	Ready to use	Christian Lawson-Perfect	20/11/2019 14:41
Probability of picking a particular colour ball from a bag	Ready to use	Christian Lawson-Perfect	20/11/2019 14:41
Maria's copy of Choose the probability of getting certain scores on a die	draft	Maria Aneiros	27/05/2019 02:29
Maria's copy of Probability of picking a particular colour ball from a bag	draft	Maria Aneiros	27/05/2019 02:32
Choose the probability of getting certain scores on a die	draft	Xiaodan Leng	11/07/2019 01:57
Probability of flipping a coin and getting a tails	draft	Xiaodan Leng	11/07/2019 01:58
Probability of picking a particular colour ball from a bag	draft	Xiaodan Leng	11/07/2019 01:58
Ugur's copy of Probability of picking a particular colour ball from a bag	Ready to use	Ugur Efem	28/04/2022 11:04

There are 24 other versions that do you not have access to.

Question statement

Give any introductory information the student needs.

			Name	Type	Generated Value

red	integer	15
blue	integer	7
green	integer	10
total	integer	32

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(15,19)

JME function reference

Description

number of red balls in part c

Describe what this variable represents, and list any assumptions made about its value.

Can an exam override the value of this variable?

Generated value: `integer`

→ Used by:

total

Advice
"Unnamed part" - prompt
"Unnamed part" → "Unnamed gap" - Choice text
"Unnamed part" → "Unnamed gap" - Choice text

Parts

Gap-fill
1. Gap Choose one from a list
  Add

Gap-fill

Ask the student a question, and give any hints about how they should answer this part.

A bag contains $\var{red}$ red balls, $\var{blue}$ blue balls and $\var{green}$ green balls. One ball is removed from the bag at random. What is the probability that the chosen ball will be blue?

Enter solution as a fraction. Remember to reduce any fractions into their simplest form.

Unnamed gap

Advice

For equally likely outcomes, you can calculate the probability of a particular event occurring by using the formula

$\text{Probability of an event} = \displaystyle\frac{\text{number of favourable outcomes}}{\text{total number of outcomes}}$ .

We are told that the bag contains $\var{red}$ red balls, $\var{blue}$ blue balls and $\var{green}$ green balls and that one ball is removed from the bag at random.

The total number of balls in the bag before the chosen ball is removed is

$\var{red}+\var{blue}+\var{green} = \var{total}.$

As the ball is being removed randomly from the bag, there is an equal probability of selecting any one of the $\var{total}$ balls.

Therefore, the probability of the chosen ball being blue is

$P(\text{blue}) = \displaystyle\frac{\text{number of favourable outcomes}}{\text{total number of outcomes}} = \displaystyle\frac{\var{blue}}{\var{total}}$

Give a worked solution to the whole question.

URL

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Part	Test	Passed?
Gap-fill
Gap-fill		Hasn't run yet
Choose one from a list
Choose one from a list		Hasn't run yet

This question is used in the following exam:

Maths 1A - Homework Week 10 (Probability) by Maria Aneiros in MY QUESTIONS.

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Maria's copy of Probability of picking a particular colour ball from a bag

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Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Checkpoint description

Maria Aneiros 5 years, 10 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

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Error

Maria's copy of Probability of picking a particular colour ball from a bag

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Maria Aneiros 5 years, 10 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

Generated value: `integer`