Final answer:
To display the desired output using the variable count, the Python statement would be print(f'There are {count} students in class').
Step-by-step explanation:
To display the output 'There are 23 students in class' using the variable count with a value of 23, you can use the following Python statement with a format placeholder:
print(f'There are {count} students in class')
This statement employs an f-string, which is a way to embed expressions inside string literals using curly braces. The variable count holds the integer value 23, and when the print function is called, Python will replace {count} with 23, thus outputting the desired statement.