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Mean, Median and Mode · Question 63 of 67

Question 63

MediumOriginal question

At a factory the lowest daily wage is ₹420 and the highest is ₹780. Every wage is raised by 10% and then a bonus of ₹20 is added. What is the new range of daily wages?

₹36Correct answerYour answer₹360Correct answerYour answer₹380Correct answerYour answer₹396Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

The old range is $780 - 420$ = ₹360.
A 10% raise multiplies the range by 1.1: ₹396.
The ₹20 bonus is the same for everyone, so it does not change the range.

Worth noting

₹380 adds the bonus to the range. ₹360 ignores the percentage raise, and ₹36 is only the increase in the range.

Concept: Range under a percentage change followed by a flat addition
Typical timeTypical: 70 s
Your timeYours: —

The rule this testsRange and spread

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