Total number of students in 3 classes of a school is 333 . The number of students in class 1 and 2 are in 3:5 ratio and 2 and 3 class are 7:11 ratio . What is the strength of class that has highest number of students ?
A) 125
B) 155
C) 135
D) 165
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class1 : class2 = (3 : 5) ×7 = 21 : 35
class2 : class3 = (7 : 11) × 5 = 35 : 55
so class1 : class2 : class3 = 21 : 35 : 55
sum of ratio = 21+35+55 = 111
class 3 has the highest number of students
therefore strength of class3 =(55/111) × 333=55 × 3 = 165
class2 : class3 = (7 : 11) × 5 = 35 : 55
so class1 : class2 : class3 = 21 : 35 : 55
sum of ratio = 21+35+55 = 111
class 3 has the highest number of students
therefore strength of class3 =(55/111) × 333=55 × 3 = 165
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