Julia has 1/3 has many stamps as Robert and also 2/3 as many stamps as erin. if erin has 36 stamps, what is the total number of stamps that the 3 children have?

Erin has 36

Julia has 2/3 as many as Erin ---> she has (2/3)(36) or 24

Julia also has 1/3 as many as Robert
24 = (1/3)(Robert)
Robert has 72

Erin has 36
Julia has 24
Robert has 72
for a total of 132

To find the total number of stamps that the three children have, we need to figure out how many stamps Julia and Robert have.

Let's start by finding out how many stamps Julia has. We know that Julia has 1/3 as many stamps as Robert. So, if we let x be the number of stamps Robert has, then Julia has (1/3)*x stamps.

Now, we also know that Julia has 2/3 as many stamps as Erin, who has 36 stamps. So, if we let y be the number of stamps Julia has, then Erin has (3/2)*y stamps. We can substitute x for y in this equation because we know that Julia has (1/3)*x stamps.

Therefore, (3/2)*((1/3)*x) = 36

To solve this equation, we can simplify it by canceling out the common factors:

(3/2)*(1/3)*x = 36

(1/2)*x = 36

Now we can solve for x:

x = (36*2)/1

x = 72

So, Robert has 72 stamps.

To find out how many stamps Julia has, we can substitute x = 72 in the equation:

y = (1/3)*x

y = (1/3)*72

y = 24

So, Julia has 24 stamps.

Now, to find the total number of stamps that the three children have:

Total = Julia's stamps + Robert's stamps + Erin's stamps

Total = 24 + 72 + 36

Total = 132

Therefore, the three children have a total of 132 stamps.