Lunch-spending histogram and proportional bars

Lunch-spending histogram and proportional bars

Secondary 2
TGM Original Questions

Lunch spending of 400 pupils is grouped as follows.

Spending \(E\) (cents)Frequency
\(0\le E<100\)\(80\)
\(100\le E<200\)\(140\)
\(200\le E<300\)\(120\)
\(300\le E<400\)\(60\)
  1. Draw a histogram.
  2. Find the percentage spending at least $2.
  3. If the rectangle for \(200\le E<300\) is 24 cm high in a scaled drawing, find the height for \(300\le E<400\).

Solution:

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Answer:(a) bars 80,140,120,60; (b) \(45\%\); (c) \(12\) cm.

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