Answer:
The average number of cookies per batch is \(10\)
Explanation:
Let the number of cookies in a batch be \(x\), then it means that we can formulate the equation:
\[7x-3=74\]
Solving for \(x\) gives:
\[7x=74-3\]
\[7x=71\]
\[x=10.1428...\]
Cookies cannot be fractional so we consider the whole part only.
\(\therefore x=10\)