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400 people are asked if they drink tea. 7/10 say yes and 20% of the people who say yes drink at least 3 cups each day. Complete the frequency tree

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Answer:

The problem is not shown:

7 / 10 = 70 %

70% of 400 = 280       drink tea

20% of 400 = 80     drink at least 3 cups / day

(70 - 20)% of 400 = 200 drink tea but not as much as 3 cups / day

30% of 400 = 120  do not drink tea

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