Latest TCS Aptitude Question SOLUTION: 5. There are equal number of boys and girls in a class. If 12 girls entered out, twice the boys as girls remain. What was the total number of students in a class?

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5. There are equal number of boys and girls in a class. If 12 girls entered out, twice the boys as girls remain. What was the total number of students in a class?

Asked In TCS lav (7 years ago)

Unsolved Read Solution (9)

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Read Solution (9) :

anusha  (7 years ago)

total number of students=2x
boys=x
girls=x
x-12=x/2 (boys and girls are same if 12 are subtracted then girls become half)
2x-24=x
x=24
tolat students=2x=2*24=48
total students=48

Is this solution Helpfull? Yes (9) | No   

Zinnia Sarkar  (7 years ago)

Initially let x boys and y girls are present.12 girls left y-12,now boys=x=2*(y-12).also x=y.answer is 48

Is this solution Helpfull? Yes (5) | No   

srilatha  (7 years ago)

assume total number of boys=y
total number of girls=x
they given that equal number of girls and boys so x/y=1/1
12 girls are entered out,
x-12/y=1/2
y=2x-24 (::x=y)
x=2x-24
x=24
girls are x=24
boys are y=x=24
total number of students=x+y=>24+24=>48

Is this solution Helpfull? Yes (3) | No   

Palak popat  (7 years ago)

let boy=girl=n, 12 girls are out then it is half so total girls =12*2=24, so boys =24 then total student in class =24+24=48.

Is this solution Helpfull? Yes (3) | No (1)  

Akanksha  (7 years ago)

no of boys and girls are 24
total student =48

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reeti pandey  (7 years ago)

let the no of boys is x and no of girls is y.
Then,12 girls are entered out =y-12
also x=2*(y-12)
and x=y
solving above equation we get x=24 and y=24
hence total no of students is 48

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Roopendra  (6 years ago)

48
24 boys 24 girls

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Ashutosh  (6 years ago)

48,total number of students 48

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Vamsi  (9 Months ago)

total number of students=2x
boys=x
girls=x
x-12=x/2 (boys and girls are same if 12 are subtracted then girls become half)
2x-24=x
x=24
total students=2x=2*24=48
total students=48

Is this solution Helpfull? Yes | No   

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