Suppose There Are a Million Habitable Planets in Our Galaxy

question 2

Multiple Choice

Suppose there are a million habitable planets in our galaxy, that one in ten are habitable, that one in a thousand planets with life had at some point had an intelligent civilization, and that one in a hundred civilizations that has ever existed is in existence now. Given this, how many civilizations are in existence now?

• A) 10
• B) 1
• C) 1000
• D) 100

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Definitions:

Mean

In statistics, the average value of a set of numbers, calculated by dividing the sum of all values by the count of values.

Median

is a statistical measure indicating the middle value in a set of data when arranged in numerical order, effectively dividing the dataset into two halves.

Rate

A measure or quantity across a specific time frame, commonly used to calculate speed, frequency, or incidence.

Correlation

A statistical measure that indicates the degree to which two or more variables fluctuate together.