MYTUTOR SUBJECT ANSWERS

222 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, ...

5 months ago

Answered by Laura, a GCSE Maths tutor with MyTutor


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

462 SUBJECT SPECIALISTS

£20 /hr

Eszter H.

Degree: Modern Languages (Bachelors) - Durham University

Subjects offered:Maths, History+ 6 more

Maths
History
German
English and World Literature
English Literature
English Language
.MLAT (Modern Languages)

“I am a Modern Languages (German and Spanish) student at Durham University. I believe that the knowledge of foreign languages is becoming more and more important, thus I am devoted to help every student who want to develop their German...”

£20 /hr

Erato A.

Degree: Biomedical Sciences (Bachelors) - Queen Mary, London University

Subjects offered:Maths, Chemistry+ 3 more

Maths
Chemistry
.UKCAT.
-Personal Statements-
-Medical School Preparation-

“Making students feel empowered and motivated while building good bases before entering to the next level of education.”

MyTutor guarantee

£18 /hr

Rohan P.

Degree: Human genetics (Other) - Nottingham University

Subjects offered:Maths, Biology

Maths
Biology

“Friendly and approachable university student. Seek to ensure aiding of tutee in achieving personal goals, motivating them with their own progress.”

About the author

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

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

Paul travels from Rye to Eston at an average speed of 90 km/h. He travels for T hours. Mary makes the same journey at an average speed of 70 km/h. She travels for 1 hour longer than Paul. Work out the value of T

Simplify and solve the following equation: x^2 -8x +15=0

What is the multiplication rule in probability?

How do I solve a pair of simultaneous equations?

View GCSE Maths tutors

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

mtw:mercury1:status:ok