The probability that an event will occur is the proportion of times the event is expected to happen in a suitably large experiment.

To estimate is to find a value that is close enough to the right answer, usually with some thought or calculation involved.

Checking a claim

Maths

Misleading data

Understanding advertising

Elections

Voting systems

Thinking critically with maths

The {{}} that an event will occur is the proportion of times the event is expected to happen in a suitably large experiment.

To {{}} is to find a value that is close enough to the right answer, usually with some thought or calculation involved.

The price of an item of clothing rose from £42 to £48. What is the percentage increase (1 d.p.) in the cost of this item?

The price of an item of clothing fell from £48 to £42. What is the percentage decrease (1 d.p.) in the cost of this item?

In a raffle there is a 1 in 280 chance of winning a prize. What is the probability of winning if you buy one ticket? Give your answer as a percentage to 1 d.p.

Jacob is correct - you should never play as the probability of winning is 0.0%

Jacob is incorrect - the probability of winning is actually 0.00%

Jacob is incorrect - he has rounded to 1 d.p. so it looks like you can't win.

In a raffle there is a 1 in 28 000 chance of winning a prize. Jacob thinks you can never win as the probability of winning is 0.0%. What error has Jacob made?

If I roll a fair 6-sided die, what is the probability that I roll a 4?

If I roll a fair 6-sided die, what is the probability that I roll a prime number?

Alex calculates the average amount of time his classmates spend on homework in a week. Which of these might he have calculated?

Which average is found by identifying the middle value when the data is arranged in order?

In a sale, a coat is reduced by 30% and is now selling for £42. What did the coat originally cost?

A painting was bought for £28 and then later sold for 34% more than it was bought for. What was it sold for?

Checking a claim

Lesson outcome