Final answer:
The question asks for an expected number of children for a specific age group mother but does not provide sufficient data for a concrete answer. A statistical approach to determine this would require demographic data on average family size or birth rates, which is not provided. Therefore, no specific expectation can be given without additional information.
Step-by-step explanation:
The question appears to require a statistical probability determination based on certain given data. However, the question itself is not clear, as it lacks sufficient information for a precise calculation. It mentions a 49 to 53-year-old mother who had a live birth in 2012, but it does not provide any statistical data that correlates the age of the mother with the number of children she might have. Without specifics on fertility rates or average number of children for women in this age group, it is impossible to calculate an expected number of children (or 'bars' as it may be a typo).
Considering the information provided:
- Births are approximately uniformly distributed between the 52 weeks of the year.
- The average number of births per 1,000 people per year is typically in the range of 5-30.
These details suggest that we might be looking at a problem related to birth statistics, yet they don't directly answer the original question. To accurately answer how many children a woman within a specific age range might have, we would need demographic data such as average family size or birth rates specific to that age group. Since we do not have this information available, we cannot provide a meaningful expectation of the number of children ('bars').