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Of the 240 students eating lunch, 96 purchased their lunch and the rest brought a bag lunch. What is the ratio of students purchasing lunch to students bringing a bag lunch?

Answer 1

Eli Assouline

#2" ":" "3#

The number of students who bring a bag lunch = #240-96 = 144#

A ratio is a comparison between the two quantities.

#" students who purchase ":" students who bring"#

#color(white)(xxxxxxxxxxxxxx)96" ":" "144" "larr# find simplest form

#color(white)(xxxxxxxxxxxxxxx)8" ":" "12" "larr div 12#

#color(white)(xxxxxxxxxxxxxxx)2" ":" "3" "larr div 4#

If you had recognised that the #HCF# was #48# you could get the the simplest form immediately. If not, divide by any common factors.

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Answer 2

Nathan Axel

The ratio of students purchasing lunch to students bringing a bag lunch is 4:1.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.