Questions: "Normal rainfall" means within 20% of the long-term average, or between 682 mm and 1022 mm. In what percent of all years is the rainfall normal? 96.16% 3.84% 20% 99.18%

"Normal rainfall" means within 20% of the long-term average, or between 682 mm and 1022 mm. In what percent of all years is the rainfall normal? 96.16% 3.84% 20% 99.18%
Transcript text: (b) "Normal rainfall" means within $20 \%$ of the long-term average, or between 682 mm and 1022 mm . In what percent of all years is the rainfall normal? $96.16 \%$ $3.84 \%$ $20 \%$ $99.18 \%$
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Solution

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Solution Steps

To determine the percentage of years with normal rainfall, we need to calculate the proportion of years where the rainfall is between 682 mm and 1022 mm. This involves checking the given options to see which one matches the calculated proportion.

Step 1: Understanding the Problem

We are given a range for "normal rainfall" as between 682 mm and 1022 mm. We need to determine the percentage of years in which the rainfall falls within this range from the given options: 96.16%, 3.84%, 20%, and 99.18%.

Step 2: Analyzing the Options

The problem provides four options for the percentage of years with normal rainfall. We need to identify which of these options correctly represents the percentage of years where the rainfall is within the specified range.

Step 3: Selecting the Correct Option

Since the problem does not provide specific data to calculate the percentage, we assume that one of the given options is correct. We need to choose the option that logically fits the context of the problem. Given the typical distribution of rainfall, a high percentage like 96.16% or 99.18% is more plausible for normal conditions.

Final Answer

\(\boxed{96.16\%}\)

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