Question

1/4 students of a school come by school bus while 2/5 students ride a bicycle to school. All the other students walk to school, of which 1/3 walk on their own and the rest are escorted by an elder.If 196 students come to school walking on their own,how many students study in that school.

Answer 1

(1/4)+(2/5)+(students that walk to school)=1
thus
students probability that walk is .35
and .35*(1/3) walk on their own
this 196=.35*(1/3)x
find x from last equation