Bookwork code: C20
Rory, Elisha and Harry each spun the same spinner a
number of times and recorded how many times it landed
on a section labelled 5. Their results are shown below.
a) They each used their own results to work out the
estimated probability of the spinner landing on 5. Which
person had the best estimate for the probability?
b) By combining all of their results, work out the
estimated probability of the spinner landing on 5. Give
your answer as a decimal.
Calculator
E allowed
c) Will using the combined results give a better or worse
estimate than using only one person's results? Write a
sentence to explain your answer.
Number of times
the spinner landed on 5
Total number of spins
Rory
30
50
Elisha
23
90
Harry
31
60