Question

If the mean of a,b and c is 16, find the mean of
1). a+5,b+5,c+5
2)a-7,b+11, c+17
3)3a-1,3b-1,3c-1

Answer 1

Answer:

1) (a+5)+(b+5))+(c+5)

(16+5)+(16+5)+(16+5)

(21+21+21)/3

63/3

21

2) (a-7)+(b+11)+(c+17)

(16-7)+(16-11)+(16+17)

(9+5+23)/3

37/3

12.33

3) (3a-1)+(3b-1)+(3c-1)

(3×16 - 1)+(3×16-1)+(3×16-1)

(48-1)+(48-1)+(48-1)

(47+47+47) / 3

47