Weighted Grader

This shows how to use intervals in a problem.

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Complete Code

Download file: WeightedGrader.pg

POD for Macro Files

PG problem file

Explanation

DOCUMENT();
loadMacros('PGstandard.pl', 'PGML.pl', 'weightedGrader.pl', 'PGcourse.pl');

Preamble

These standard macros need to be loaded. 
BEGIN_PGML

* This answer is worth 20%.  Enter 1 [___]

* This answer is worth 50%. Enter 3 [___]

* This answer is worth 30%. Enter 7 [___]
END_PGML

Setup

The answer blanks do not have answers associated with them because we will use the WEIGHTED_ANS command below.

install_weighted_grader();

WEIGHTED_ANS(
  Real(1)->cmp, 20,
  Real(3)->cmp, 50,
  Real(7)->cmp, 30
);

Answer

Before checking answers, install_weighted_grader(); needs to be called to ensure the weighted grader is used.

The WEIGHTED_ANS command takes pairs of answer checkers and their relative weights. The example here gives weights as percents as the total weights added to 100, but weights of (2,5,3) or (4,10,6) would have worked the same way.

BEGIN_PGML_SOLUTION
Solution explanation goes here.
END_PGML_SOLUTION

ENDDOCUMENT();

Solution

A solution should be provided here.