Question 12 plz urgent
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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 )
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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
diya1398:
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