Correct Answer : Data Item
Explanation : A Variable is any characteristics, number, or quantity that can be measured or counted. A variable may also be called a data item.
Correct Answer : Slow processing of documents
Explanation : Code and text is in one place.
Correct Answer : There are three types of random variable
Explanation : There are two types of random variable- continuous and discrete.
Correct Answer : RMarkdown
Explanation : knitr is available on CRAN.