Question

7. The arithmetic mean of 6 numbers is 52. If one more number is included the mean of new
set of numbers becomes 51 find the included number​

Answer 1

Answer:

Step-by-step explanation:

∴ (x1+x2+x3+x4+x5+x6) /6 =52

⇒x1+x2+x3+x4+x5+x6 =52×6

let the new number be y

⇒x1+x2+x3+x4+x5+x6+y =312+y

⇒(x1+x2+x3+x4+x5+x6+y)/7 =(312+y)/7

⇒51 =(312+y)7

⇒312+y=51×7

⇒y=357-312=45

included number is 45

Hope it will help you