Page 28 - 01-Yr5_Front cover-ccp.indd

30 coins. pad
• Probability experiments • newspaper • Probability puzzles • • • • •
10
Ca.:rd cha.nee
Work with a friend.
~=M•J&10~ rn If you toss a coin 30 times, write how many times you think: Imagine these cords ore turned face down I -=M•J:l."10~
and one cord is turned over at random.
PAGE 50 a it will lond heads up b it will land tails up. OJ List the 12 equally likely outcomes. 9 PAGE 51
Ii] Write the probability (as a fraction) 7
~ a Now experiment by tossing a coin 30 times.
a Decide who will toss the coin and who will record each outcome. that the number turned over is:
a Drop the coin on a thick pad of newspaper to keep it quiet! a even b divisible by 3
• Use a table like this, or design your own, and label it Experiment 1. c less than 4 d a prime number s-- 8
e >12 f a square number 12
Experiment 1 g <13 h between 2 and 5.
Outcome Tolly Frequency 32. '\~ ­
® .Ult I ---- //
CD 1111 Name draw
Imagine that everyone in your class, including your teacher,
has put their first name on an identical card in a bag.
You take out one name.
Id] Write the probability (as a fraction) that you will pick:
a a girl's name b a boy's name
c the teacher's name d a name beginning with C.

ITJ ITJ

Open: predict how many times a coin would land heads up and heads 1, 2, 3, 4, 5, 6, 7, 8, q, 10, 11, 12
down when thrown 30 times.
cg]
6 b 1~ or t c f2 or t
a 12 or 2
Practical: experiment with tossing a coin 30 times and recording results on 5
d ( 1 is not usually accepted as a prime.)
a table. 12
3 1
e 0 f 12 or 4 g 1

Practical: repeat the experiment three times.
Open: write the probability of picking particular first names out of the
whole class.

Open: predict how many times a coin would land heads up and heads Challenge
down when thrown 120 times.
4 pink, 4 blue, 10 purple, 18 orange, 24 yellow, 28 green, 32 red.

Practical: draw a table and total the results of the four experiments.