shift 2nd book from table 1 to 2..now order will ..1st on table 1 and 2(top),3(bottom) on table 2..now transfer the books on table 2 to table 1..hence required arrangement 1,32.

Two persons a(speed=15km/hr )and b=20 km/hr meet at p at same time.One day b was late by some time, so a started walking towards b and meet him at q 30 km front.by how much time b was late...Explain approach

70% of the students who joined XLRI last year play footbal, 75% play cricket, 80% play basketball, 85% percent play carrom, the minimum percentage of students who play all the 4 games is ?