L2 Probability

Which of these scales do we use to measure probability?

• -1 to 1

• 0 - 100

• 0 - 1

• 0 - 1000

How would you describe a probability of 0.75?

• Certain

• Unlikely

• Impossible

• Likely

What of these probabilities would you say is unlikely?

• 1

• 0.2

• 0

• 0.5

What is the chance of winning the lottery?

• 1 in 300 million

• 1 in 900 thousand

• 1 in 12 million

• 1 in 2 billion

There are 12 red roses, 5 yellow roses and 3 white roses in a vase.

What is the probability of choosing a yellow rose at random?

Give your answer in it's simplest form.

Leo is taking a penalty for his team.

Based on his previous record, he has a 0.6 chance to score the penalty.

What is the chance that Leo misses?

In a bag of sweets there are 3 pink, 6 purple and 7 yellow sweets.

What is the chance of picking a yellow OR purple sweet out of the bag at random?

Give your answer in it's simplest form.

There are 6 blue, 4 red and 5 green counters in a bag.

What is the chance of picking a counter that is NOT green at random?

Give your answer in it's simplest form.

• 0.67

• 0.4