10.01 Experimental probability

A retail store served 773 customers in October, and there were 44 complaints during that month.

Calculate the experimental probability that a customer complains. Give your answer as a percentage, rounded to the nearest whole percent.

At a factory, 1000 computers were tested with 15 found to be faulty. Calculate the experimental probability that a computer at this factory will be faulty.

Find the experimental probability of the following:

At a set of traffic lights, the green light is on for 24 seconds, then the yellow light lasts for 3 seconds, and then the red light is on for 13 seconds. This cycle then repeats continuously.

If a car approaches the traffic light, calculate the probability that the light will be:

An insurance company found that in the past year, of the 2558 claims made, and 1493 of them were from drivers under the age of 25. Calculate the experimental probability, as a whole percentage, that a claim is filed by someone:

The experimental probability that a person uses public transport is 50\%. Out of 500 people, how many would you expect to use public transport?

Hermione rolled a standard six-sided die 60 times.

A factory produces tablet computers. In March it produced 8000 tablets, and 240 were found to be faulty.

Uther flipped a coin 14 times.

Derek spun the following spinner 20 times:

a

How many times would he expect the arrow to land on X?

b

After he finished spinning, he noticed that the arrow fell on X 8 times. Find the experimental probability of getting an X.

Oprah has a bag with 2 red balls, 2 blue balls, and 2 green balls in it. She took a ball out of the bag and returned it 24 times.

Georgia is drawing a card out of a deck of 10 cards, labeled from 1 to 10. She drew a card and returned it to the bag 40 times.

Of 50 people buying coffee at a cafe, 39 bought a latte.

A maternity ward delivers the following number of babies each day for two weeks:

5, 6, 4, 7, 6, 6, 4, 6, 5, 5, 6, 5, 6, 6

Of 3000 students graduating as teachers from a particular university, 8\% graduate as Mathematics teachers.

Boxes of individually wrapped chocolates, with 20 chocolates per box, are randomly sampled to see how many blueberry chocolates are in each box.

The results from the samples are shown in the table:

To prepare for the week ahead, a restaurant keeps a record of the number of each main meal ordered throughout the previous week.

High school students attending an international conference were asked to register what language they speak other than English. The results are shown in the table below:

Five schools compete in a basketball competition. The results from the last season are given in the table below:

Calculate the experimental probability that Ackley Bridge wins one of their matches.

The table shows the main fighting style of each fighter in a mixed martial arts tournament:

The table shows the number of trains that arrived on time at the local station during the week:

In an experiment, several balls coloured either green or black and numbered 1 to 11 are placed in a bag. The table shows all the outcomes that occured:

Find the probability that a ball drawn at random:

A group of students were surveyed on their eye colour. The results are shown in the table:

The graph shows the four countries that university students applied to for exchange in the last month. Calculate the relative frequency of the country with the fewest applications.

The following graph shows the number of people that were served at a furniture store, and the length of time it took to serve them:

The size of several earthquakes was measured over a period of time and the results are presented in the graph. The numbers on the horizontal axis represent the class centres: