Latest Elitmus Aptitude Question SOLUTION: There are some students in the class teacher arranged them in a circle,number 40 is facing number 12 what is the maximum number of boys facing the girls.... 10 number of girls mo

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There are some students in the class teacher arranged them in a circle,number 40 is facing number 12 what is the maximum number of boys facing the girls.... 10 number of girls more than boys....?

Asked In Elitmus shabana ismail (9 years ago)

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TANIA KARMAKAR  (9 years ago)

let there r x no of boys.
So no of girls=x+10
total=2x+10

they r arranged in circle.
40th student is facing 12.
so consider a circle with 12 and 40 opposite to each other just like 12 &6 are opposite in a watch.
therefore no of students in between 40 &12 =40-12-1=27
(like 12-6-1=5 in watch)
now count starts from 1
so (12-1=11 students)+ (16 students)=27 students
therefore last student=40+16=56th student.

total=2x+10=56
x=23

no of boys=23
no of girls=33
maximum possible ways that boys may face girls should be 23 as boys no is less than girls.

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akash verma  (9 years ago)

let no. of oys = x;
girls == x+10;
40 face 12
so , no.of student between them is 40 - 12 = 28;
so total no.of student(girls+boys)== 28*2==56;
now;
x(boys)+(x+10)(girls)==56;
2x+10==56;
2x==46;
x==23;
so maximum boys face girls is 23;
an no.of girls==33;

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SUPRIYO DAS  (9 years ago)

very clear solution ... thnx @Tania

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