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 24 kg.
b) Work out the maximum number
of dogs that could have a mass of
more than 24 kg.
Mass, x (kg)
0≤x≤10
10≤x≤20
20≤x≤30
30≤x≤40
Frequency
2
7
12
6