## Day 21

### General Studies 1

### Statistics

**Direction (1-5): Read the following information carefully and answer the given questions?**There are 500 students in a school. Every student likes different color like red, yellow and blue. 36% of the students like Yellow and the ratio of the number of students like red and yellow only to the number of students like yellow and blue only is 2: 3. Number of students like all the colors is 20. Ratio of the number of students like only red to the number of students like only yellow is 3:2. Number of students like yellow only is equal to the number of students like yellow and blue only. Number of students like both red and blue is 50% of the number of students like only blue. The number of students like only Blue is equal to the number of students does not like any color.

1**) Find the number of students does not like yellow?**

2**) What is the ratio of the number of students like at most two colors to the number of students like only red, only yellow and only blue together?**

3**) The number of students like Blue is approximately what percent of the number of students like red?**

4**) What is the difference between the number of students like two colors only and the number of students like at least two colors?**

**5) What is the sum of the number of students does not like any color and the number of students like all the three colors?**

### General Studies 2

### General Science

- Urban area flooding has been a frequent disaster in various cities of India.Briefly describe it and measures which needs to be taken to mitigate it with special reference to recent Patna flood in 2019.
- Throw light on the water crisis in India?Write an account on the possible approaches for water conservation and management and steps taken by government.

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