Final answer:
To find the number of children in the group, set up the equation (1/9)x = 6 and solve for x. The number of children is 54.
Step-by-step explanation:
To find the number of children in the group, we can set up an equation using fractions. Since each child got 1/9 of a pizza, we can represent the total number of pizzas as 6 and the number of children as x. The equation would be:
6 = (1/9)x
To solve for x, we can multiply both sides of the equation by 9 to get rid of the fraction:
54 = x
Therefore, there were 54 children in the group.