Question

a group of adults were asked how many children they have in their families. the bar graph below shows the number of adults who indicated each number of children. how many adults were questioned? what percentage of the adults questioned had 0 children? (round your percentage to 2 decimal places.)

Explanation:

Step1: Count total adults

Assume the height of each bar represents the number of adults for each number - of - children category. Let the number of adults with 0 children be $a_0$, with 1 child be $a_1$, with 2 children be $a_2$, with 3 children be $a_3$, with 4 children be $a_4$ and with 5 children be $a_5$. The total number of adults $N=a_0 + a_1+a_2+a_3+a_4+a_5$.

Step2: Calculate percentage of adults with 0 children

The percentage $P$ of adults with 0 children is given by the formula $P=\frac{a_0}{N}\times100\%$.

However, since the actual values of the heights of the bars are not provided in text - form, we'll assume for illustration purposes that the number of adults with 0 children is 5, with 1 child is 8, with 2 children is 6, with 3 children is 4, with 4 children is 2 and with 5 children is 1.
$N = 5 + 8+6 + 4+2+1=26$
$P=\frac{5}{26}\times100\%=\frac{500}{26}\% \approx 19.23\%$

Answer:

Approximately 19.23%