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A botanical garden has 400 species of plants, and 10% of them are rare. How many

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Question: A botanical garden has 400 species of plants, and 10% of them are rare. How many rare species are there?

Options:

  1. 30
  2. 40
  3. 50
  4. 60

Correct Answer: 40

Solution: 

10% of 400 is 40, so there are 40 rare species.

A botanical garden has 400 species of plants, and 10% of them are rare. How many

Practice Questions

Q1
A botanical garden has 400 species of plants, and 10% of them are rare. How many rare species are there?
  1. 30
  2. 40
  3. 50
  4. 60

Questions & Step-by-Step Solutions

A botanical garden has 400 species of plants, and 10% of them are rare. How many rare species are there?
  • Step 1: Understand that 10% means 10 out of every 100.
  • Step 2: Find out how many groups of 100 are in 400. This is done by dividing 400 by 100, which equals 4.
  • Step 3: Since there are 4 groups of 100 in 400, we can find 10% by multiplying 4 (the number of groups) by 10 (the percentage we want).
  • Step 4: Calculate 4 times 10, which equals 40.
  • Step 5: Therefore, there are 40 rare species of plants in the botanical garden.
  • Percentage Calculation – Understanding how to calculate a percentage of a total quantity.
  • Basic Arithmetic – Performing multiplication to find a portion of a number.
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