Question

The total marks obtained by a student in 3 subjest a,b,c together is 80 more than the marks obtained by

b. what the average marks aobtained by a and c together

Answer 1

hope this helps you..

Answer 2

Answer:

The average marks obtained by a and c together is 40.

Step-by-step explanation:

Given,total marks obtained by a student in 3 subject a,b,c together is 80 more than the marks obtained by b.

Let, a obtained total x marks.

b obtained total y marks and c obtained total z marks.

Therefore,total marks obtained by a,b and c $= (x + y + z)$

According to question,

$(x + y + z) - y = 80$

We are removing brackets,

$x + y + z - y = 80 \\ x + z = 80$

Therefore,total marks of a and c is 80.

We know, avarage = $\frac{sum \: of \: total \: numbers}{total \: number}$

So,here average marks obtained by a and c

$= \frac{80}{2} \\ = 40$

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