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Mean, Median and Mode · Question 59 of 67

Question 59

MediumOriginal question

A tailor has a bundle of ribbons whose lengths have a range of 18 cm. She makes every ribbon three times as long, then trims 5 cm off each new ribbon for the knot. What is the range of the finished lengths?

Options for question 59

Show the answer and explanation
CorrectNot quiteAnswer D

Correct answer: D

Explanation

  1. Multiplying every value by 3 multiplies the range by 3: 54 cm.

  2. Subtracting 5 from every value does not change the range.

Worth noting

49 cm subtracts 5 from the range as well. A shift changes the largest and smallest by the same amount, so their difference stays.

Concept
Effect of scaling and shifting on the range
Typical time
70 s
Your time
—
The rule this testsRange and spread
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