Latest Syntel Aptitude Question SOLUTION: In a class of 52 students the number of boys is two less than the number of girls. Average weight of the boys is 42 kg, while the average weight of all the 52 students is 40 kg. Wh

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(#M40006965) SYNTEL Numerical Ability question Basic numeracy problem Keep an EYE

In a class of 52 students the number of boys is two less than the number of girls. Average weight of the boys is 42 kg, while the average weight of all the 52 students is 40 kg. What is the approx. average weight of the girls.
1. 38 kg
2. 39 kg
3. 40 kg
4. 42 kg

Asked In Syntel (12 years ago)

Solved Anandeeswari Read Solution (4)

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Read Solution (4) :

Anandeeswari  (10 years ago)

girls=x
boys=x-2
x+x-2=52 ==> x=27

girls= 27
boys = 25
avg of boys
=> sum of boys weight/25 = 42
=> sum of boys weight=1050
avg of girls
=> sum of students weight/52 = 40
=> sum of students weight=2080
sum of girls weight = sum of students weight-sum of boys weight
sum of girls weight = 2080-1050 = 1030

avg of girls weight = 1030/27 = 38.1(approximately)
ans = 38 kg

Is this solution Helpfull? Yes (14) | No   

Anandeeswari  (10 years ago)

girls=x
boys=x-2
x+x-2=52 ==> x=27

girls= 27
boys = 25
avg of boys
=> sum of boys weight/25 = 42
=> sum of boys weight=1030
avg of girls
=> sum of students weight/52 = 40
=> sum of students weight=2080
sum of girls weight = sum of students weight-sum of boys weight
sum of girls weight = 2080-1030 = 1050

avg of girls weight = 1050/27 = 38.1(approximately)
ans = 38 kg

Is this solution Helpfull? Yes (5) | No (2)  

santosh bhor  (10 years ago)

39
replace above given aans whr 25*42=1050

Is this solution Helpfull? Yes (4) | No (4)  

sarvesh kiavathekar  (6 years ago)

avg wt of total class= (avg wt of boys +avg wt of girls)/2
40=(42+x)/2
80=42+x
x=38

Is this solution Helpfull? Yes (1) | No   

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