Question

the average marks of six students is 8 one more student mark is added and the mean is still 8 find the student mark that has been added​

Answer 1

Answer:

The Marks of 7th person are 8.

Step-by-step explanation:

As we have given in the question that

The average marks of six students is 8 one more student mark is added and the mean is still 8.

Let Mark's of 6 students are M1, M2, M3, M4, M5, M6

So according to question

(M1+M2+M3+M4+M5+M6)/6=8

M1+M2+M3+M4+M5+M6=48 ……….(1)

Now let the Marks of 7th Student be M7

So according to question

(M1+M2+M3+M4+M5+M6+M7)/7=8

M1+M2+M3+M4+M5+M6+M7=56

48+M7=56

M7=56-48=8

M7=8

Hence the Marks of 7th person are 8.