Tom has a 4-sided spinner and the table below shows the probabilities that when the spinner is spun it will land on 1, 3 and on 4
Number
1
2
3
4
Probability
0.1
0.2
0.4
The spinner is spun once.
a) What is the probability that the spinner will land on 2?
Il
(1)
b) Which number is the spinner least likely to land on?
(1)
c) If Tom spins the spinner 80 times, work out an
estimate for the number of times the spinner will land on 3
(2)