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Caselets

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Caselets contain questions based on data given in a paragraph. This data could be quite cryptic in nature. However, obtaining the value of the unknown or decoding the given data is the most important part of solving a caselet.

This form of data interpretation checks the candidate’s ability to swiftly go through a long text, absorbing important data points.

 Let's solve a few problems to understand this:

LBT Nuts and Bolts Pvt. Company Ltd. produces 1000 bolts in one batch. Quality officer Vimal has to decide whether to test that batch of bolts or not before packing and sending it to the customers. If he wants to test, then he can use 2 tests. The first one is called a screening test, which costs Rs. 2/bolt. Since it is not accurate, it sends 20% of the defective bolts to the customer as a good one. But test II is more accurate and identifies all the defective bolts. But the cost of the test is Rs. 3/bolt. A defective bolt identified before sending can be corrected at a cost of Rs. 25/bolt. For defective bolts to be identified at buyer’s end Vimal will have to pay a penalty of Rs. 50/bolt.

1) If Vimal has 160 defective bolts, he should use?

a) Test I only    b) Test II only    c) No Test      d) Either Test I or II

Solution:

 

2) Vimal should not test if the number of defective bolts in the lot is?

a) Less than 100     b) Less than or equal to100      c) Between 101 to 120        d) More than 200

Solution:

The best way to approach is to assume that the no of defective bolts is 100.

Cost when no test is conducted: 50x100 = Rs.5000

Cost to conduct test I:

 

Cost to conduct test II:

 

Vimal should not test when the number of defective bolts is less than 100.

Hence, option (a) is correct.

3) If there are exactly 200 defective bolts, then Vimal should use?

a) Test I and not test II  b) Test II and not test c) Test I or test II d) No Solution:

If he does not perform any test then the cost = 200 x 50 = Rs.10000

 


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