Combinatorics | Number Theory Answers

A card is drawn at random from a standard deck. Find the theoretical probability that the card is neither an ace nor a heart.

A card is drawn at random from a well shuffled deck of 52 cards. What is the theoretical probability of drawing a face card or a spade?

rational number between root 2 and root4 ?

if each of the dimensions of a rectangle is increa?sed by100% the area is increased by

rational number between root 3 and root 5

There are 5 balls of different colors and 5 boxes of colors the same as those of the balls. The number of ways in which the balls, one in each box can be placed such that a ball does not go to a box of its own color is...?? WITH EXPLANATION PLEASE

Find number of selections of three different numbers from set {1, 2, 3, ...., 101} so that they form an A.P.

I would like to know how many combinations of 4 there are in numbers 1 to 15?

11^(1/2)/11^(1/4)

if A is subset of real number and B is real number then show that inf(b+a)=a+inf(A)