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.

Answered by Charlie H. Maths tutor

8606 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

There are 6 orange sweets and n total sweets in a bag. The probability of picking two sweets one at a time randomly and both being orange is 1/3. Show that n^2 - n - 90 = 0


Solve 5w – 3 = 3w + 15


The sides of a rectangle are x and (x+2), where x>0 the area of the rectangle is 8, what is the value of x?


Factorise y^2 + 7y + 6


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