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Q.
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
View Answer
Correct choice: D
Explanation:
Ratio C1:C2 = 3:5 and C2:C3 = 7:11 So C1:C2:C3 = 21 : 35 : 55 Let the strength of three classes are 21x, 35x and 55x respectively, then Given that 21x + 35x + 55x = 333 => 111x = 333 or x=3 So strength of the class with highest number of students =55x = 55x3 = 165.
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