In a maternity center, 10% of all the childbirth cases result in twins. What is the approximate percentage of twins of total children born?10%14%18.2%17.8%

Assuming that all births are either single or twin births, we can calculate the percentage of twins of total children born as follows:

1. If 10% of all childbirth cases result in twins, then 90% of all childbirth cases result in single births.
2. Each twin birth results in 2 children, while each single birth results in 1 child.
3. Therefore, for every 100 childbirth cases, there would be 90 single children and 20 twin children (10 twin births times 2), for a total of 110 children.
4. The percentage of twins of total children born would then be 20/110 = 0.1818, or approximately 18.2%.

So, the answer is 18.2%.