The table shows information about the
masses of some dogs.
a) Work out the minimum number of dogs
that could have a mass of more than 26 kg
b) Work out the maximum number of dogs
that could have a mass of more than 26 kg
Mass, x (kg)
0≤x≤10
10≤x≤20
20≤x≤30
30≤x≤40
Frequency
4
8
11
5