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Question

Over the past 200 working days, the number of defective parts produced by a machine is given in the following table:

No of defective parts
0
1
2
3
4
5
6
7
8
9
10
11
12
13








Days
50
32
22
18
12
12
10
10
10
8
6
6
2
2









Determine the probability that tomorrow's output will have more than 13 defective parts.

A
0
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B
0.25
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C
0.5
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D
1
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Solution

The correct option is A 0
The no. of possible outcomes =14 ...[starting from defect count =0 to defect count =13]

The no. of days required =50 to 2 days.

As the maximum defects possible would be 13, hence the event of more than 13 defects could be treated as an impossible event.

So, the probability of more than 13 defects =0.

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