Page 425 - Math Smart - 7

b) The probability of 0.1 Is 10% as a percentage.

a) Crossroads High School.
The probability of the team beating Crossroads High School is 90%. This
is close to 1 on the probability scale which means the team is likely to
beat Crossroads High School.
b) The probability of 90% is 0.9 as a decimal.

a) New Horizons High School.
The probability of the team beating New Horizons High School is 5. This
is exactly halfway between 0 and 1 on the probability scale which means
the team has an even chance to beat New Horizons High School.
b) The probability of ^ is 50% as a percentage.

c) The probability of 2 is 0.5 as a decimal.

i!

Draw a probability scale and position the following events on the scale.

Events
A 1 can run faster than a cheetah.
B Autumn comes before winter in the same year.

C More people will buy umbrellas on a rainy day.
Match each event with the correct letter on the probability scale.
0 1 1
1 I ^ I I I—I—1—I—I—I

i l i t I t

A C O B E F
a) A triangle will have three sides.
b) The probability of drawing a black card from a pack of 52 playing cards.

c) A number picked from the numbers 0 to 10 will be 12.
d) The probability of drawing a purple ball from a bag containing 9 purple balls and 1 orange
ball.
e) The probability of drawing a green ball from a bag containing 5 blue balls and 5 green balls.
f) The probability of drawing a white ball from a bag containing 3 white balls and 7 yellow balls.

Sam went to a safari. The probability that the first animal he spots is an antelope is 58%, an
elephant is 12%, a lion is 6%, a crocodile is 5% and a zebra is 19%.
a) Draw a percentage probability scale. Mark the position of each animal on the probability scale.
b) Which animal is most likely to be spotted first?
c) Which animal is least likely to be spotted first?

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