Measurements of the distances, x mm, between two moving parts inside car engines were recorded and are summarised in the following table. There were 156 engines of type A and 156 engines of type B.
a)Draw and label two cumulative frequency curves on the same axes.
b)Use your graphs to estimate:
i )the number of engines of each type with measurements between 0.30 and 0.70 mm
ii )the total number of engines with measurements that were less than 0.55 mm.
c )Both types of engine must be repaired if the distance between these moving parts is more than a certain fixed amount. Given that 16 type A engines need repairing, estimate the number of type B engines that need repairing.
Я не понимаю как решить пункт С. Я даже не особо понимаю что от меня требуют.