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Question

Study the table and answer the question that follows.

 

 Year 
State200020052015
Himachal Pradesh11090150
Uttar Pradesh1208590
Madhya Pradesh906580
Andhra Pradesh557565
Tamil Nadu15090115

In which state was the annual rainfall (in cm) for 2005 greater than the average annual rainfall (in cm) for all three years?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
Andhra Pradesh

Analyzing Rainfall Data Table

The question asks to identify the state where the annual rainfall in 2005 exceeded the average annual rainfall calculated across the years 2000, 2005, and 2015 for that specific state. We need to calculate the average rainfall for each state and compare it with the 2005 rainfall.

Year 2000 2005 2015
Himachal Pradesh 110 90 150
Uttar Pradesh 120 85 90
Madhya Pradesh 90 65 80
Andhra Pradesh 55 75 65
Tamil Nadu 150 90 115

Calculating Average Rainfall Per State

The average annual rainfall for each state is calculated using the formula:

$ \text{Average Rainfall} = \frac{\text{Rainfall}_{2000} + \text{Rainfall}_{2005} + \text{Rainfall}_{2015}}{3} $

Let's calculate the average for each state:

  • Himachal Pradesh: $ \frac{110 + 90 + 150}{3} = \frac{350}{3} \approx 116.67 \text{ cm} $
  • Uttar Pradesh: $ \frac{120 + 85 + 90}{3} = \frac{295}{3} \approx 98.33 \text{ cm} $
  • Madhya Pradesh: $ \frac{90 + 65 + 80}{3} = \frac{235}{3} \approx 78.33 \text{ cm} $
  • Andhra Pradesh: $ \frac{55 + 75 + 65}{3} = \frac{195}{3} = 65 \text{ cm} $
  • Tamil Nadu: $ \frac{150 + 90 + 115}{3} = \frac{355}{3} \approx 118.33 \text{ cm} $

Comparing 2005 Rainfall with Average

Now, we compare the rainfall in 2005 for each state with its calculated average annual rainfall:

  • Himachal Pradesh: 2005 Rainfall (90 cm) is NOT greater than Average (116.67 cm).
  • Uttar Pradesh: 2005 Rainfall (85 cm) is NOT greater than Average (98.33 cm).
  • Madhya Pradesh: 2005 Rainfall (65 cm) is NOT greater than Average (78.33 cm).
  • Andhra Pradesh: 2005 Rainfall (75 cm) IS greater than Average (65 cm).
  • Tamil Nadu: 2005 Rainfall (90 cm) is NOT greater than Average (118.33 cm).

The state where the annual rainfall for 2005 was greater than the average annual rainfall for all three years is Andhra Pradesh.

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