How many students would be leaving on a field trip if 15 students were leaving out of a total of 210?

 195

Step-by-step explanation:

I did the 210 students (the total of students on the field trip) subtracted by the 15 students who were leaving.  In the end I got 195.

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.

the answer is:

mean: 6

mad: 2.14