Hence,the option is B. If you have any doubts plzz lemme know.
Answer:
y+30
Step-by-step explanation:
the sum of the numbers is 15y
the new sum after increase each number by 30 is 15y+450
the new mean 15y+450/15
= y+30
Answer:
a=13m
Step-by-step explanation:
that's it in the picture