The model shows boys as 1 unit and girls as 4 units.<br><br>Girls = 4 &times; Boys, so total children = 5 equal units.<br><br>&bull; Total units = 1 + 4 = 5 units<br>&bull; 5 units &rarr; 375 children<br>&bull; 1 unit (boys) &rarr; 375 &divide; 5 = 75<br><br>There are 75 boys.<br>Check: Girls = 4 &times; 75 = 300, Total = 75 + 300 = 375. &#10003;