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There are 10 reading spots in a room. Each reading spot has a round table. Each round table has 4 chair. If different no of persons are sitting at each reading spot. And if there are 10 persons inside the room then how many reading spots donot have atleast a single reader.
(a) 5 (b) 6 (c) 7 (d) None

Read Solution (Total 2)

10 reading spots and 4 chairs each
total 10 persons
different no. of seating must
so
1st-1person
2nd-2person
3rd-3person
4th-4person
by above way 10 peoples are seated
so empty chairs = 10chairs - 4chairs = ans: 6chairs
13 years agoHelpfull: Yes(16) No(6)

10 reading spots in a room
Each round table has 4 chair
10 persons inside the room

Since they asked how many reading spots donot have "atleast" a single reader
So consider max probablity .. If 1st n 2nd spot are completely filled.. ie 4 persons on each= 8persons
So remaining 2 persons on 3rd spot...
Then 10spots-3spots= 7 Spots donot have atleast a single reader...!!
13 years agoHelpfull: Yes(3) No(19)

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