Answer:
9/10
Step-by-step explanation:
Since there is only one marble per number and there is only one marble for the number 8 you would take just subtract 10-1 which would give you 9.
Less than because if you subtract 11, 138 minus 9,405 you get the answer you get 1,733 and that is less than 2,000
Let us denote the smaller even integer by

.
Then, the next even integer must be

.
To verify, set

as any even number, say

.
Then, the next even integer must be 2 more than this number, i.e.

.
The sum of these two consecutive even integers can be expressed as:

We are told that this sum divided by four is 189.5, i.e.

Multiplying both sides by 4 will reverse the division:

Subtracting 2 from each side will reverse the addition:

Dividing both sides by 2 will reverse the multiplication:

Therefore, the two consecutive integers must be
378 and
380.
Check this: