How many of the females who were being tracked and who were between 20 and 30 years of age in 1980 died between the ages of 50 and 60?
[Note: There is an ambiguity in this question and hence was discarded by IIM Bangalore.]
Explanation:
1980 age range 20-30 (500) is same as 2000 age range 40-50 (175) is same as 2010 age range 50-60 (145 females)
30 people from this category died from 2000 to 2010, but it is not necessary that they were between 50-60 years old.
Someone who was 41 years old in 2000 may have died before he/she attains the age of 50.
The answer to this question should be cannot be determined.
Hence, this question was discarded.
Note: Answer provided in Candidate response sheet is 30.
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