The ratio of students of three classes is 2:3:4. If 12 students are increased in each classes then their ratio turns into 8:11:14. What was the total number of students in all the three classes originally ?

The ratio of students of three classes is 2:3:4. If 12 students are increased in each classes then their ratio turns into 8:11:14. What was the total number of students in all the three classes originally ?

A) 162
B) 108
C) 96
D) 54

Answer
A) 162

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READ  The ratio of zinc, copper and tin in any alloy is 2:3:1, and in another alloy the ratio of copper, tin and glass is 5:4:3. If in a new alloy both are taken in same weight, then what will be weight of glass per kg in the new alloy?

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  1. INITIAL RATIO WAS 2:3:4 IF 12 STDS INCREASED THEN, RATIO BECOME 2X+12:3X+12:4X+12, WHERE X IS TOTAL NO OF STDS. AND INCREASED RATIO IS GIVEN i.e., 8:11:14

    WE HAVE,

    (2X+12) = 8
    ——- —
    (3X+12) 11

    SOLVE IT…

    WE GET X=18

    SUBSTITUTE VALUE OF X IN RATIO 2X:3X:4X
    AND ADD IT YOU WILL GET TOTAL NO OF STUDENTS.

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