Math, asked by ramjisenthilkumar, 2 months ago

mean weight of 80 students is two classes A and B 50kgs. there are 45 students in class A. the mean weight of the students in class B us 48. find the mean weight of the students in class A

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Answered by biswabandita98

HELLO GUYS!!

Step-by-step explanation:

Let x be the number of boys, then the number of girls will be (60−x).

Let x be the number of boys, then the number of girls will be (60−x).The mean weight of boys is 50 kg, then the total weight of boys will be, 50x.

Let x be the number of boys, then the number of girls will be (60−x).The mean weight of boys is 50 kg, then the total weight of boys will be, 50x.The mean weight of girls is 30 kg, then the total weight of girls will be 30(60−x)=1800−30x.

=40

=4060

=40601800−30x+50x

=40601800−30x+50x =40

=40601800−30x+50x =40x=

=40601800−30x+50x =40x= 20

=40601800−30x+50x =40x= 20600

x=30

x=30So, the number of boys is 30 and the number of girls is (60−30)=30.

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Answered by akashkr979899

Answer:

sum of total mass of all students/80=50

sum of total mass of all students=50*80

sum of total mass of all students=400kg

number in class B=80-45

=35

sum of total mass of class B/35=48

sum of total mass of class B=48*35

sum of total mass of class B=1680kg

sum of total mass of class A=4000-1680

=2320

mean mass of class A=sum of total mass of class A/number of students in class A

=2320/45

=51.55(approximately)

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mean weight of 80 students is two classes A and B 50kgs. there are 45 students in class A. the mean weight of the students in class B us 48. find the mean weight of the students in class A​

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mean weight of 80 students is two classes A and B 50kgs. there are 45 students in class A. the mean weight of the students in class B us 48. find the mean weight of the students in class A