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11. The number of students in the three sections of a class are in the ratio 2 : 3 : 4. The average marks scored in each of these sections is in the ratio 4 : 3 : 1. By what percent is the average mark of the second section more than the class average?

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class avg=(8+9+4)/(2+3+4)=7/3 unit
2nd sec marks avg=3 unit
therefore ans is=((3-7/3)/(7/3))*100%=200/7%
10 years agoHelpfull: Yes(20) No(1)

2/7*100=200/7%
10 years agoHelpfull: Yes(1) No(1)
(2/7) use direct multiplication
10 years agoHelpfull: Yes(0) No(7)
28.57% is the ans
10 years agoHelpfull: Yes(0) No(0)
200/7 is d ans
10 years agoHelpfull: Yes(0) No(0)

TCS Other Question

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