Answer :
[tex]students\ that\ have\ no\ siblings:\\
35\%*300=\frac{35}{100}*300=105\\\\
students\ that\ have\ siblings:\\
300-105=195\\\\ 195\ students\ have\ siblings.[/tex]
X 35%
----- -------
300 100
100x 10500
----- = -------
100 100
X=105
The answer is 105
----- -------
300 100
100x 10500
----- = -------
100 100
X=105
The answer is 105