GCSE Secondary Maths Age 13-17 - Probability & Statistics: Tree Diagrams - Explained

The video tutorial explains how to use a tree diagram to calculate probabilities in a non-replacement situation. It covers the probability of selecting red and yellow tulip bulbs from a bag, detailing the steps to fill in the tree diagram. The tutorial also demonstrates how to calculate the probability of at least one yellow tulip using different methods, emphasizing efficiency and accuracy in non-calculator scenarios.

What is the probability of drawing a red tulip bulb first?

• 9 out of 10

• 7 out of 10

• 5 out of 10

• 3 out of 10

In a non-replacement situation, how many tulip bulbs remain after the first draw?

• 10

• 9

• 8

• 11

If a red bulb is drawn first, what is the probability that the second bulb is also red?

• 8 out of 9

• 5 out of 9

• 6 out of 9

• 7 out of 9

What is the probability of drawing a yellow bulb second if the first bulb was red?

• 4 out of 9

• 3 out of 9

• 2 out of 9

• 5 out of 9

What is the probability of drawing two red bulbs in succession?

• 50 out of 90

• 48 out of 90

• 42 out of 90

• 54 out of 90

How can you calculate the probability of at least one yellow bulb without extensive calculations?

• By calculating the probability of two yellow bulbs

• By calculating the probability of no yellow bulbs and subtracting from one

• By adding the probabilities of all outcomes

• By multiplying the probabilities of all outcomes

What is the probability of getting at least one yellow tulip bulb?

• 42 out of 90

• 44 out of 90

• 48 out of 90

• 46 out of 90