Find the numbers in the required order: boys → girls → total, then simplify.<br><br>
&bull; Boys = 25, Girls = 15, Total = 25 + 15 = 40<br>
&bull; Ratio of boys : girls : total = 25 : 15 : 40<br>
&bull; HCF of 25, 15, and 40 is 5.<br>
&bull; 25 ÷ 5 = 5, 15 ÷ 5 = 3, 40 ÷ 5 = 8<br>
&bull; Simplest form: 5:3:8<br><br>
Final Answer: 5:3:8