The average mark of 100 students is 33 out of 50. They are divided int

1.	The average mark of 100 students is 33 out of 50. They are divided into three divisions A, B and C with strengths 50,30 and 20 respectively. If the average marks of both A and B is 36 and that of both B and C is 30 then the average marks of class B is
Answer» Answer: I am sure every one of you will be ABLE to answer this in the FOLLOWING way Step-by-step explanation: Average of 70 students = 80. Hence total marks of all the 70 students = 70x80 = 5600 Out of these 70, average of 40 students = 75 Hence total marks of these 40 students = 40x75 = 3000. So the total marks of the remaining 30 students = 5600-3000 = 2600 Hence the average of the remaining 30 students = 2600/30 = 86.66

The average mark of 100 students is 33 out of 50. They are divided into three divisions A, B and C with strengths 50,30 and 20 respectively. If the average marks of both A and B is 36 and that of both B and C is 30 then the average marks of class B is

Answer»

Answer:

I am sure every one of you will be ABLE to answer this in the FOLLOWING way

Step-by-step explanation:

Average of 70 students = 80.

Hence total marks of all the 70 students = 70x80 = 5600

Out of these 70, average of 40 students = 75

Hence total marks of these 40 students = 40x75 = 3000.

So the total marks of the remaining 30 students = 5600-3000 = 2600

Hence the average of the remaining 30 students = 2600/30 = 86.66

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The average mark of 100 students is 33 out of 50. They are divided into three divisions A, B and C with strengths 50,30 and 20 respectively. If the average marks of both A and B is 36 and that of both B and C is 30 then the average marks of class B is

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