Question

an art instructor kept track of how many pictures her students painted. painting pictures how many people are there in all? people

Explanation:

Step1: Count the number of Xs for each number of pictures painted

For \(0\) pictures: \(4\) Xs.
For \(1\) pictures: \(6\) Xs.
For \(2\) pictures: \(5\) Xs.
For \(4\) pictures: \(2\) Xs.
For \(5\) pictures: \(4\) Xs.

Step2: Sum up the number of Xs

$$4 + 6+5 + 2+4$$

$$=(4 + 6)+5+(2 + 4)$$

$$=10+5 + 6$$

$$=21$$

Answer:

\(21\)