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CASE STUDY BASED - 1
Finding fault
A washing machine company makes two types of washing machines. Top
loaded and front loaded. At the end of daily production, washing machines are
tested and those with faults are removed and sent for repair
The following table shows the average number of washing machines of each type
that are made per day and the average percentage of faulty machines per day.
MACHINE TYPE
AVERAGE NUMBER OF
MACHINES MADE PER DAY
AVERAGE
PERCENTAGE OF
FAULTY MACHINES
TOP LOADED
1000
29
FRONT LOADED
2000
2.5%
a) What is the average number of faulty top loaded machines produced by the
company in a day.
1 2
m) 20
m) 200
IV) 10
b) What is the average number of front loaded faulty machines produced by the
company in a day.
1) 5
m) 50
1) 500
iv) 25
c) What is the total number of perfect machines produced by the company in a day
0 2970
a) 2930
m) 2900
IV) 3000
d) What is the total number of faulty(top loaded and front loaded) machines prod
by the company in a day.
0 7
) 70
it) 700
iv) 35
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