Page 435 - Math Smart - 7

Estimate the probability that your team will win.
Sokitioii

Your team won 22 out of 30 of their previous matches. The experimental
probability of your team winning is about 0.73.
The opposing team won 8 out of 30 of their previous matches. The experimental
probability of the opposition team winning is about 0.27. Based on this data, you
can estimate that it is more likely that your team will win.

A spinner, with 5 equal sectors is spun 100 times.
The results of the experiment are provided in the
table below.
f •
Colour red green pink blue orange
Frequency
20 17 10 35 18
Use the data to estimate the probability of the spinner landing on each
colour sector. Write the estimated probability in decimal form.
A coin is tossed 50 times. It lands on 'heads' 20 times.
a) Estimate the probability of the coin landing on heads.

b) Estimate the probability of the coin landing on tails.
c) Is this a fair coin? Explain.

A survey was conducted to find out which car colour was most popular at
a promotion fair. The number of cars sold during the fair was recorded in
the table below.

Colour Frequency

Red 9
Green 7

Blue 25
Black 33
White 108
Silver 18

a) How many cars were sold altogether at the fair?
b) Estimate the percentage probability of the next car being sold is white.
c) If you were to guess the colour of the car least likely to be bought by a
customer, what colour would you guess? Use the data to explain your
answer.

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