Three types of machine A, B and C, are used by a company to produce items which are very prone to a certain type of imperfection.A random sample of 100 items from each machine showed the number of perfect and imperfect items as follows:

Condition

Machine

A

B

C

Perfect

33

39

48

Imperfect

67

61

52

Test whether there is evidence of significant association between machine type and proneness to imperfection.Use 5% level of significance.