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.

LD
Answered by Laura D. Maths tutor

8549 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Work out the value of 81^(-1/4) (Non-Calculator)


There are 495 coins in a bottle. 1/3 of the coins are £1 coins. 124 of the coins are 50p coins. The rest of the coins are 20p coins. Work out the total value of the 495 coins


Solve the simaltaneous equations: 3x + 4y = 10, 2x + 3y = 7


Solve the simultaneous equations: 6a + b = 16 and 5a - 2b = 19


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning