Question

ed worked for a laundry that washed tablecloths. ed’s manager asked him to find a way to remove stains from the tablecloths. ed thought that bleach would help to remove the stains, but he wasnt sure about the amount to use.
ed washed five loads of tablecloths with no bleach, five loads with ½ cup of bleach, and five loads with one cup of bleach. then, he compared the percentage of tablecloths in each group that had stains left.
washing tablecloths
complete the sentence.
in this experiment, the tablecloths washed with one cup of bleach were part of ______.

a control group
an experimental group

Explanation:

In an experiment, the control group is the one without the variable (here, no bleach), and experimental groups have the variable (different amounts of bleach). The tablecloths with one cup of bleach have the bleach variable, so they are in an experimental group.

Answer:

an experimental group