A scientist is studying tulips and daffodils. The scientist estimates that there are 150 tulips in the population of 600 tulips and daffodils. He chooses flowers from random parts of the garden to study. Which best explains how he can choose a random sample of flowers to represent the population?
Answer
A
He can choose 50 flowers.
B
He can choose 15 tulips and 60 daffodils.
C
He can choose 25 tulips and 25 daffodils.
D
He can choose 10 tulips and 30 daffodils.
Explanation
Tulips make up 150 ÷ 600 = 1/4 of the population, so a representative sample should have about one tulip for every three daffodils. Choice D has 10 tulips and 30 daffodils, which keeps that 1-to-3 ratio.
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