16Hit1600
Information and IdeasHardInference about a hedgerow's age

Information and Ideas practice question

A rule used by naturalists says that a hedgerow gains roughly one new woody species per thirty-metre stretch every hundred years. The hedge along Long Lane has nine woody species in a thirty-metre stretch. By the rule, the hedge ____

Which choice most logically completes the text?

  1. A. is roughly nine hundred years old.Correct
  2. B. was planted about ninety years ago.
  3. C. contains no more than three species.
  4. D. is thirty metres long in total.

Answer: A. is roughly nine hundred years old.

One species per century; nine species.

Why the other answers are wrong

B. was planted about ninety years ago.
Ninety years would give about one species.
C. contains no more than three species.
Nine are counted.
D. is thirty metres long in total.
Thirty metres is the sample length.

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