Question

The average marks of 5 students is 82.If the marks scored by 4 of the students are
72 , 83 ,88 and 78, find the mark scored by the fifth student

Answer 1

Answer:

the marks of 5th student is 80.6

Answer 2

Answer:

Let me tell you first that the formula to find average is :

Sum of all values / total no. of values

Now, A.T.Q

(A+B+C+D+E)/5 = 82

A+B+C+D+E = 82×5=410

(A,B,C,D,E are supposed to be the five subjects)

It is given,

(A+B)/2 =86.5

So, A+B= 173

Also,

(D+E)/2 =84

D+E = 168

Putting these values in the equation:

173+C+168 = 410

C = 410–173–168

C= 69

Thus, you get your answer as 69 marks.

Step-by-step explanation:

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