GCSE Secondary Maths Age 13-17 - Probability & Statistics: Two Way Table - Explained

The video tutorial explains how to calculate probabilities using a two-way table with chocolate sweets. It covers finding the probability of selecting a dark chocolate caramel and a white chocolate sweet from a bag. Additionally, it demonstrates how to determine the probability of selecting a white chocolate from a box by using subtraction, ensuring all probabilities sum to one.

What is the probability of picking a dark chocolate caramel sweet from the bag?

• 1 out of 15

• 1 out of 30

• 2 out of 30

• 1 out of 20

How many white chocolate sweets are there in total in the bag?

• 5

• 11

• 9

• 7

What is the probability of selecting a white chocolate sweet from the bag?

• 10 out of 30

• 8 out of 30

• 9 out of 30

• 7 out of 30

If the probability of picking a dark chocolate is 0.35 and milk chocolate is 0.17, what is the probability of picking a white chocolate?

• 0.48

• 0.17

• 0.52

• 0.35

What is the sum of probabilities for all types of chocolates in the box?

• 0.85

• 1.00

• 0.95

• 0.90