You can use the Views module to do this.
- Create a new view
- Remove sort options, fields and other default settings
- Add a field for "Content: Type"
- Expand the "advanced" part on the right and set "Use aggregation" to "Yes"
- Add yet another field for "Content: Type"
- On the second "Content: Type" field, click "Aggregation settings"
- Set the aggregation type to "count"
- The second "Content: Type" should now look like "COUNT(Content: Type)"
THIS IS NOT MY SOLUTION LOOK HERE: Count of nodes by type