Answer:
see below
Step-by-step explanation:
Closed under addition, subtraction and multiplication
Not closed under division :-
for example 3/4 = 0.75 which is not an integer
Question 1: 60x + 25 + 60y
Answer:
0.980
Step-by-step explanation:
Use a calculator with built-in distribution functions.
Example:
normcdf(-2.05, 10000) = 0.980
