In a bag of balls, 3 are red, 2 are blue and 5 are green. Two balls are selected from the bag. Calculate the probability that both are green.

Answer:2/9On the first pick of the bag, there are 10 balls in total. Out of these balls, 5 are green. Therefore the probability of picking a green ball will be 5/10 or 1/2. On the second pick of the bag, there are now 9 balls. Out of the 9 balls, 4 balls are green. Therefore, the probability of selecting a green ball on the second pick is equal to 4/9. As the first pick and second pick of the bag are independent events, the probability of picking two green balls is equal to 1/2 * 4/9. By multiplying the denominators together and the numerators together, the probability is found to be 4/18 or 2/9.

CH
Answered by Charlie H. Maths tutor

8766 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve algebraically: 6a+b = 16 and 5a - 2b = 19


What is (x-5)^2


How do you factorise a quadratic equation where the coefficient of x² isn't 1?


Solve for x: y=x^2-x-12


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences