MYTUTOR SUBJECT ANSWERS

100 views

A bag contains 12 bals of different colours: 5 red, 4 blue and 3 yellow. What is the probability of not selecting a red ball

The probability of an event not happening is 1 minus the probability of the event happening. Five of the twelve balls are red so the probability of selecting a red ball is 5/12. The probability of not selecting a red ball is 1 - 5/12. Find a common denominator in order to calculate this subtraction: 1 - 5/12 = 12/12 - 5/12 = 7/12.

Laura D. GCSE Maths tutor, A Level Maths tutor, 11 Plus Maths tutor, ...

2 months ago

Answered by Laura, a GCSE Maths tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

330 SUBJECT SPECIALISTS

£18 /hr

Georgiana P.

Degree: Mathematics (Bachelors) - Bristol University

Subjects offered: Maths

Maths

“I am a Maths student at the University of Bristol and hope to share my love of maths with you. I believe that Maths is learnt in 3 steps:    1) I will explain and we will discuss the main principles of what we are working on, assis...”

£18 /hr

Anna G.

Degree: Dentistry (Bachelors) - Leeds University

Subjects offered: Maths, Chemistry+ 1 more

Maths
Chemistry
Biology

“Hello! I’m Anna and I’m currently studying dentistry at Leeds University. Maths was one of my favourite subjects at school and I studied it all the way up to A level. However, not everyone enjoys Maths! It’s commonly known as the trick...”

MyTutor guarantee

£20 /hr

Chloe W.

Degree: Mathematics (Bachelors) - Bristol University

Subjects offered: Maths, Further Mathematics

Maths
Further Mathematics

“About Me:I'm Chloe and I'm a 2nd year maths student at Bristol university. I've always enjoyed working with numbers and I hope that I can encourage others to love working with them too!I've tutored both of my siblings through their...”

About the author

Laura D.

Currently unavailable: for new students

Degree: Post Doctoral Researcher in Mathematics (Research) - Exeter University

Subjects offered: Maths, Physics

Maths
Physics

“About me: I am a post doctoral researcher in mathematics at the University of Exeter. This means I am employed by the university to do research and help out with the lecturing and tutoring of undergraduates. I completed mymaths degree...”

MyTutor guarantee

You may also like...

Posts by Laura

A bag contains 12 bals of different colours: 5 red, 4 blue and 3 yellow. What is the probability of not selecting a red ball

A musical instrument produces a sound wave with a frequency of 1000 Hz. The sound wave has a wavelength of 0.34 m in air. Calculate the speed of the sound wave in air.

The triangle ABC is such that AC=8cm, CB=12cm, angle ACB=x radians. The area of triangle ABC = 20cm^2. Show that x=0.430 (3sf)

Write down two reasons for using statistical models

Other GCSE Maths questions

Solve x² + x -12

Factorise x^2 + 3x +2

Solve the simultaneous equations 5x + 3y = 24 and 3x - 4y = 26

Can you solve these simultaneous equations and find the values of x and y? Equation 1: 2x + y = 14 Equation 2: 4x - y = 10.

View GCSE Maths tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok