Final answer:
To find the total number of students who walked to school, subtract the students who came by bicycle or came by car from the total number of students.
Step-by-step explanation:
To find the total number of students who walked to school, we need to subtract the number of students who came by bicycle or came by car from the total number of students.
The total number of students is 100.
From the given information, we know that 49 of the 100 students are girls, and 10 of the girls came by car. This means that 39 of the girls either walked or came by bicycle.
For the boys, we know that 16 of them walked and 21 of the 41 students who came by bicycle are boys. So, a total of 37 students either walked or came by bicycle.
To find the total number of students who walked, we can subtract the students who came by bicycle or came by car from the total.
Total number of students who walked = Total number of students - Students who came by bicycle - Students who came by car
Total number of students who walked = 100 - 37 - 10
Total number of students who walked = 53
Therefore, the total number of students who walked to school is 53.