Question

Question 12 plz urgent

Answer 1

The average  of n numbers x1,x2,x3…………,xn is A . If X1 is replaced by (x+a)x1 , X2 is replaced by (x+a)x2……then what is new average ?
Solution :
The average of x1,x2,…..xn is A;
i.e
(x1+X2+X3+………Xn)/n =A   ………………………………………(1)
Now ;
[(x+a)x1+(x+a)x2+(x+a)x3+…….(x+a)xn]/n=(x+a)[(x1+x2+x3+….xn)/n]
                                                   =(x+a)A   ………..from (1)
                    (Since (x1+X2+X3+………Xn)/n =A   )



H҉ O҉ P҉ E҉  
I҉ T҉   
H҉ E҉ L҉ P҉ S҉
  Y҉ O҉ U҉  

Answer 2

Answer:

Step-by-step explanation: