Data from random samples will not always include the same values. Values are chosen randomly and they may or may not be the same. So means will vary among samples.
Answer:
The answer for the first equation is,
B. 11
The answer for the second equation is,
D.none of these.
While it does sounds redundant, it could be a "part to whole" ratio
Answer:
I think Vivek is 20 and his father is 50
Because 30 + 30 equals 60 as he has to be half his age he'll be 30 but that's in 10 years time. you just subtract 30 and 60 by 10 and you'll get 20 and 50