Answer:
8 balloons
Step-by-step explanation:
We want to find how many she kept for herself.
She brought 24 balloons to the picnic.
She gave 1/3 to Karen.
She will be left with 2/3 of the balloons:
2/3 * 24 = 16
She will be left with 16 balloons.
She gave 1/2 of what was left to Tim. She will be left with 1/2 of the balloons:
1/2 * 16 = 8
She will be left with 8 balloons.
