Lemmara logoLemmaraWorked solution

0580/13 Oct/Nov 2024, Question 5: Basic Probability

Cambridge IGCSE Mathematics 0580 · Paper 13 (Core) · Calculator · 3 marks

اقرأ هذا الحل مشروحاً بالعربي ←

The question, in short

A bag holds 6 red, 4 green and 2 blue balls; Zia picks one at random. Using the lettered probability scale from 0 to 1, identify the letter matching each stated probability.

Summarised in our own words. Use the official paper for the exact wording and the diagram.

Part (a) · 1 mark

Find the letter on the scale for the probability that the ball taken is green.

  1. 1P(green) = 4/12 = 1/3 = 2/6
  2. 2A = 0 and each step is 1/6, so 2/6 is at C

AnswerC

Part (b) · 1 mark

Find the letter on the scale for the probability that the ball taken is yellow.

  1. 1There are no yellow balls, so P = 0: A

AnswerA

Part (c) · 1 mark

Find the letter on the scale for the probability that the ball taken is not blue.

  1. 1P(not blue) = 10/12 = 5/6
  2. 25/6 is at F

AnswerF

Stuck on a step? Read the free lesson: Basic Probability

Practise more basic probability questions

Real 0580 past-paper questions, marked on your working like the exam, with a worked solution for every part.

Practise free on Lemmara

More past-paper questions on basic probability

Also searched as: 0580/13/O/N/24 · 0580_w24_qp_13 · 0580 w24 13 · question 5.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.