CAT DILR Questions | CAT Data Tabulation questions
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Comprehension
A study to look at the early learning of rural kids was carried out in a number of village spanning three states, chosen from the North East (NE), the West (W) and the South (S). 50 four-year old kids each were sampled from each of the 150 villages from NE, 250 villages from W and 200 villages from S. It was found that of the 30000 surveyed kids 55% studied in primary schools run by government (G), 37% in private schools (P) while the remaining 8% did not go to school (O).
The kids surveyed were further divided into two groups based on whether their mothers dropped out of school before completing primary education or not. The table below gives the number of kids in different type of schools for mothers who dropped out of school before completing primary education:
It is also known that:
1.In S, 60% of the surveyed kids were in G. Moreover, in S, all surveyed kids whose mothers had completed primary education were in school.
2.In NE, among the O kids, 50% had mothers who had dropped out before completing primary education.
3.The number of kids in G in NE was the same as the number of kids in G in W.
Explanatory Answer
Method of solving this CAT DILR Question from Data Tabulation question
We know that the break up for the kids by Government School, Private School and Other for mothers who dropped out before completing Primary. If we can complete a similar table for mothers who did complete primary, that should be very useful. We know the overall numbers and so can fill the gaps for the remaining.
Let us just recap the overall numbers
We know that the break up for the kids by Government School, Private School and Other for mothers who dropped out before completing Primary. If we can complete a similar table for mothers who did complete primary, that should be very useful. Since we know the overall numbers, this part should be easy.
In S, 6000 students overall were in G. Of this, 5100 are from mothers who had dropped out. So, mothers who finished and student in G should be 900. And O in second table should be 0.
This gives us private school in S in the second table as well. That should be 4300-900 = 3400
NE-O box should be identical for “Mother Drop-Out” and “Mother Finished” tables. Or, NE-O in second box should be 300. This also gives us W-O for second table
G in NE and G in W both in Mother Drop-out have 4200 each. So, G in NE and G in W should also both be identical. These two cells should be 1050
Post this we can fill the last two cells.
3700 out of 10000, or 37%
The question is "What percentage of kids from S were studying in P?"
Hence, the answer is "37%".
Choice A is the correct answer.
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