total num of pupiles in 3 grades of scholl is 333 . the no of pupiles in grades 1 and 2 are un 3:5 ratio and 2 and 3 grades are 7:11 ratio .what is the strength of class that has highest no of pupils	Choose the correct choice from the following
A) 145  B) 155  C) 165  D) 175  E) 185
Ratio G1:G2=3:5 and G2:G3=7:11   So G1:G2:G3=21 : 35 : 55   Let the strength of three classes are 21x, 35x and 55x respectively, then 21x+35x+55x= 333   =&gt; 111x= 333 or x=3   So strength of the class with highest number of pupils=55x=55*3= 
<gadget id="calculator">55*3</gadget>
<output>165</output>
165   ANSWER:165
<result>C</result>
total num of pupiles in 3 grades of scholl is 333 . the no of pupiles in grades 1 and 2 are un 3:5 ratio and 2 and 3 grades are 7:11 ratio .what is the strength of class that has highest no of pupils