Mean of 75 numbers = 35
If each observation is multiplied by k then the mean becomes k times the original mean.
Since each observation is multiplied by 4 then the new mean = 4 × 35 = 140.
Now u can do easily i think............

1

Anushka answered this

New mean= 38?4=152.

1

Akshara Upadhyay answered this

Mean of 75 numbers =35
If each observation is multiplied by k
then the mean becomes k times the original
mean.
Since each observation is multiplied by 4 then the
new mean =4*35=140

1

AdhvikðŸ˜ŽðŸ˜Ž answered this

mean of 75 no. is 35 multiply each number by k the k times original mean then multiply 4 with 35 and you get 140