672 views

### There are 5 white socks and 3 black socks in a draw. Steven takes out 2 at random. Work out the probability that Steven takes out 2 socks of the same colour.

P(WW) = 5/8 x 4/7 = 20/56

P(BB) = 3/8 x 2/7 = 6/56

P(same colour) = 20/56 + 6/56 = 26/56 = 13/28 (simplified)

1 year ago

Answered by Tom, a GCSE Maths tutor with MyTutor

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

#### 786 SUBJECT SPECIALISTS

£18 /hr

Degree: Mathematics (Bachelors) - Bristol University

Subjects offered:Maths, Chemistry+ 1 more

Maths
Chemistry
Biology

“I am currently studying Maths at University and absolutely love it! I can't wait to share my enthusiasm with you!”

£18 /hr

Degree: Chemistry (Masters) - Imperial College London University

Subjects offered:Maths, Chemistry+ 1 more

Maths
Chemistry
Biology

“Oxford PhD student eager to demystify chemistry and boost student confidence through personalised lessons.”

Trusted by schools

|  3 completed tutorials

£24 /hr

Degree: Bioscience (Masters) - Durham University

Subjects offered:Maths, Science+ 5 more

Maths
Science
Human Biology
English
Chemistry
-Personal Statements-

“Hi! I'm Steven and studying Biomedical Science at Durham. I'm friendly, approachable, and passionate for my subjects.”

Currently unavailable: for new students

Degree: MSc Ecological Economics (Masters) - Edinburgh University

Subjects offered:Maths, Philosophy+ 2 more

Maths
Philosophy
English
Economics

“I have fostered a passion for teaching ever since taking the opportunity to travel to China and teach at an English language school for Chinese pupils.  This experience not only massively broadened my horizons culturally, but also gav...”

### You may also like...

#### Posts by Tom

ABC is a right angled triangle. D is the point on AB such that AD = 3DB. AC = 2DB and angle A = 90 degrees. Show that sinC = k/√20 where k is an integer. Find the value of k

There are 5 white socks and 3 black socks in a draw. Steven takes out 2 at random. Work out the probability that Steven takes out 2 socks of the same colour.

#### Other GCSE Maths questions

3x^2 + 7x - 13 = 0. What is x?

Make n the subject of the formula: m = 5n - 21

Explain how to solve simulatentous equations.

Solve the following equation by factorisation: x^2 - 2x -15 = 0

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