Question

pl answer no spam bro and sis​

Answer 1

you should do the formula about the mean formula

Answer 2

Answer:

15.3

Step-by-step explanation:

let Krishna 's marks be x Marks

x=15

n=10

(x=x+ x-8 +x-6 + x-3 + x-1 + x+ x+ 2+x +3 + x+4 +x+6 =10x -3

15 = 10x -3 /10

150 + 3 = 10x

x= 153 /10 = 15.3 Mark's

therefour scored 15.3 marks