Symbiosis National Aptitude Test SNAP 2012 Paper

Let total number of seats in the stadium be p;
number of seats in the lower deck be x and number of seats in upper deck be y.
∴ p = x + y, x = p/4, y = 3p/4
Now in the lower deck, 4x/5 seats were sold and x/5 seats were unsold.
No. of total seats sold in the stadium = 2p/3.
No. of unsold seats in the lower deck = x/5 = p/20
No. of unsold seats in the stadium = p/3
∴ Required fraction =

p 20

p 3

=

3

20