A certain country has 504 universities and 25951 colleges. These are categorised into Grades I, II, and III as shown in the given pie charts.
What is the percentage, correct to one decimal place, of higher education institutions (colleges and universities) that fall into Grade III? 
The symbols O, *, \(\Delta\), and \(\square\) are to be filled, one in each box, as shown below.
The rules for filling in the four symbols are as follows.
1) Every row and every column must contain each of the four symbols.
2) Every 2x2 square delineated by bold lines must contain each of the four symbols.
Which symbol will occupy the box marked with ‘?’ in the partially filled figure? 
A certain country has 504 universities and 25951 colleges. These are categorised into Grades I, II, and III as shown in the given pie charts.
What is the percentage, correct to one decimal place, of higher education institutions (colleges and universities) that fall into Grade III? 
The symbols O, *, \(\Delta\), and \(\square\) are to be filled, one in each box, as shown below.
The rules for filling in the four symbols are as follows.
1) Every row and every column must contain each of the four symbols.
2) Every 2x2 square delineated by bold lines must contain each of the four symbols.
Which symbol will occupy the box marked with ‘?’ in the partially filled figure? 