In a chess competition involving some boys and girls of a school, every student had to play exactly one game with every other student. It was found that in 45 games both the players were girls, and in 190 games both were boys. The number of games in which one player was a boy and the other was a girl is
Correct Answer : A
A new flag is to be designed with six vertical stripes using some or all of the colours yellow, green, blue and red. Then, the number of ways this can be done such that no two adjacent stripes have the same colour is
There are n boxes, each of which contains several coins of denominations Rel, Rs.2, Rs.3, Rs.4 and Rs.5. If exactly 10 coins are randomly drawn from each of the boxes, then fmd the minimum possible value of n such that at least eight coins of the same denomination arc obtained on the whole.
Ram has four children whose nicknames are Honey, Sunny, Moni and Bunny.He had a total of 12 mangoes to distribute among them such that each child got at least one mango.Find the number of 'ways of distributing the mangoes such that Bunny receives exactly 5 mangoes.