Latest TCS Aptitude Question SOLUTION: a person secured 30 of 50 in history and 20 of 60 in physics and x of 40 in chemistry if the person has secured an average of 60% in the 3 subjects what should be the value of x?

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a person secured 30 of 50 in history and 20 of 60 in physics and x of 40 in chemistry if the person has secured an average of 60% in the 3 subjects what should be the value of x?

Asked In TCS sravan (11 years ago)

Unsolved Read Solution (15)

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Read Solution (15) :

Vaibhav Tyagi  (11 years ago)

(marks scored/total marks)*100=(30+20+x)/(50+60+40)*100=60
50+x/150=60
x=40
So he have to score full marks ie 40/40 for scoring 60%

Is this solution Helpfull? Yes (21) | No (2)  

RAKESH  (11 years ago)

total marks=50+60+40=150
obtained mark=30+20+x=50+x
given (50+x)=150*60/100=90
so x=40

Is this solution Helpfull? Yes (6) | No (3)  

kumari neha  (11 years ago)

% in history=(30/50)*100=60%
percentage in physics=(20/60)*100=33.33%
percentage in chem=(x/40)*100=5x/2%
and average (60+33.33+5x/2)/3=60
so x=34.66 ans

Is this solution Helpfull? Yes (5) | No (7)  

Mohan Patel  (11 years ago)

34.66
30 of 50=60%
20 of 60=33.33%
x of 40 =2.5x%
[60+33.33+2.5x]/3=60
x=34.66

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vinit agarwal  (11 years ago)

60% of 150 = 90
90-30-20-40
so 40 is ans

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sravan  (11 years ago)

but 40 is given in options

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Aarju Gangwar  (11 years ago)

sol. as follow......bcoz Max. mark of every sub. is not same....so take %tage of particular sub. marks....nd then take avg.
% in history=(30/50)*100=60%
percentage in physics=(20/60)*100=33.33%
percentage in chem=(x/40)*100=5x/2%
and average (60+33.33+5x/2)/3=60
so x=34.66 ans

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kumar chandan  (11 years ago)

30/50+20/30+x/40=60
x=4/3

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jyoti singh  (11 years ago)

50+x/110*100=60
i.e x=16

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jyoti singh  (11 years ago)

sry it was 50+x/115*100=60
i.e x=40

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Gautham Sarang  (11 years ago)

ans=40


marks scored=(30+20+x)
total marks =50+60+40 =150

(marks scored/total marks)=.6

marks scord =150*.6 =90

x= 90-30-20=40

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Ruby  (11 years ago)

max marks=(50+60+40)=150
30% of 150= 90
30+20+x=90
x=40

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ganesh chemanchula  (11 years ago)

given ((50+x)/150)*100=60
then x=90-50=40
value of x is 40

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satish  (11 years ago)

total of 2 subjcts =110 for 3 subjects=150
for history out of 50 he secured 30
for physics out of 60 he secured 20
so total 0f 2 subjects =(50/110)*100 =33.33333333
and remaining percentage is 26.666666666667 inorder to make it 60%
so if we add 40 to the marks i.e 30+20+40=(90/150)*100=60%

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varalakshmi  (10 years ago)

30/50+20/60+x/40=60/100
3/5+1/3+x/40=3/5
40/3
for 3 subjects so we neglect the 3
x=40
chemistry marks=40/40
60%

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