Question

please answer as fast as possible ​

Answer 1

heya!!!!

4. let no. of observation be 'n'

so there mean-

(x1+x2+x3......xn)/n=25------(1)

now each observation is increased by 2 so new mean-

(x1+2+x2+2+x3+2.........xn+2)/n

(x1+x2+x3.....xn+2+2+2.....2)/n

(x1+x2+x3.....xn+2n)/n

(x1+x2+x3....xn)/n+(2n)/n

25+2{from(1)}

27

5.

(x1+x2+x3......xn)/n=a.

and if

(x1+@+x2+@[email protected]+@)/n

(x1+x2+x3....n)/n+(n@)/n

a+@

hope it is helpful

mark as brainliest

follow me ✌️

if any doubt just comment