GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Ratios 2 - Explained

The video tutorial explains how to solve a probability problem involving counters in a bag. It starts by introducing the problem, which involves calculating the probability of selecting a red counter given the ratios of red to blue counters and the probability of selecting a purple counter. The tutorial walks through setting up the problem, calculating the necessary probabilities, and solving for the probability of selecting a red counter. It concludes with advice on practicing similar ratio problems.

What is the ratio of red counters to blue counters?

If the probability of drawing a purple counter is 0.2, what is the probability of drawing either a red or blue counter?

How many total counters are there in the bag if the probability of red and blue counters combined is 0.8?

What is the probability of Sam taking a red counter from the bag?

What are the three ratios of red, blue, and purple counters in the bag?