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how many births occured for mother under the age of 22

To calculate the number of births that occurred for mothers under the age of 22, we will sum the birth frequencies from the relevant age groups, as represented by the bars on the histogram.

The histogram shows the following frequencies for mothers under the age of 22:

- Age group 10–14: 39,000 births
- Age group 15–19: 134,000 births
- Age group 20–24 (we will only include up to age 21): This group has 294,000 births, but we will take half since we are only interested in ages 20 and 21. Half of 294,000 is 147,000 births.

Now, summing these:

\[
39,000 + 134,000 + 147,000 = 320,000 \, \text{births}
\]

Thus, approximately **320,000 births** occurred for mothers under the age of 22.

Would you like more details or have any questions? Here are some related questions to expand upon:

1. How is the number of births distributed for mothers in their 30s?
2. What is the most common age group for mothers giving birth in 2012?
3. How could we calculate the total number of births across all age groups?
4. What trends can be observed in the age distribution of births?
5. How would the data change if the age range were extended to include mothers aged 50 and above?

**Tip**: When analyzing histograms, dividing a grouped frequency can give you estimates for part of an age range.

How many births occurred for mothers under the age of 22?

This problem uses data interpretation of a histogram representing birth frequencies by mother's age to calculate the number of births for mothers under age 22. By summing the birth frequencies from the relevant age groups, including ages 10-14, 15-19, and 20-24 (partially), we determine that approximately 320,000 births occurred.

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