Answer:
Victor put 35 cookies on a plate for the family party.
Explanation:
The information provided is:
- Victor baked 50 cookies.
- He put 70% of them on a plate to serve at a family party.
- The rest of the cookies he placed in a box to take to his soccer team.
The total number of cookies Victor baked is, N = 50.
Compute 70% of 50 as follows:

Thus, Victor put 35 cookies on a plate for the family party.