Question

In a plane 90% seats are filled and 3 seats are empty find the total no of seats

Answer 1

In a plane
The rest 10%=3
So the total no. of seats=3×10=30seats

Answer 2

Let total no of seat be x
90% seats are filled then
10%seats are empty,
x×10%=3
x×10/100=3
x×1/10=3
x=30