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We will be solving interesting sets as a part of this series LRDI of the Day. I will be posting a video solution by the end of the day. You can keep a track of all the sets by clicking here: LRDI of the Day

#LRDIoftheDay #41 Another one on overlapping logic. We had solved a milder one here: LRDI of the Day #32

In a school that had classes from 5th standard to 10th standard, the number of students in each standard in the years 2015, 2016 and 2017 is shown in the table. Students join the school only in 5th standard and do not leave the school until they pass their 10th standard exams. The students who fail in a particular year have to study in the same standard the next year as well while those who pass go through to the next higher standard. No student failed in the same standard more than once and the pass percentage of 10th standard is 100% over the years given.

1. How many students failed in the exams held in 2015?

2. Which standard had the lowest pass percentage in the year 2015? (Write your answer in the form of the number of the standard; for example, if it is the 4th standard, mark 4 as your answer)

3. What is the difference between the number of students who joined the school in 2016 and those who joined the school in 2017?

4. What was the overall pass percentage of the school in the year 2016? (Answer should be accurate to 1 place after the decimal; for example, if it is 98.56, mark 98.6 as your answer)

5. For how many standards was the number of students who failed in 2016 more than the corresponding value in 2015?

The solution

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