How Cheenta works to ensure student success?
Explore the Back-Story

AMC 8 2020 Problem 13 | Probability Problem

Join Trial or Access Free Resources

Try this beautiful Problem based on probability from AMC 8 2020.

Probability Problem - AMC 8 2020 Problem 13

Jamal has a drawer containing 6 green socks, 18 purple socks, and 12 orange socks. After adding more purple socks, Jamal noticed that there is now a $60 \%$ chance that a sock randomly selected from the drawer is purple. How many purple socks did Jamal add?

  • 6
  • 9
  • 12
  • 18
  • 24

Key Concepts




Suggested Book | Source | Answer

AMC 8 2020 Problem 13


Try with Hints

At first Let Jamal adds $x$ purple socks,

So, He have $18+x$ purple Socks now, in total He has $36+x$

So probability of drawing a purple sock is $\frac{18+x}{36+x}$



Subscribe to Cheenta at Youtube

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Knowledge Partner

Cheenta is a knowledge partner of Aditya Birla Education Academy

Cheenta Academy

Aditya Birla Education Academy

Aditya Birla Education Academy

Cheenta. Passion for Mathematics

Advanced Mathematical Science. Taught by olympians, researchers and true masters of the subject.
Math Olympiad Program