if there are 6 cards and each of the cards is turned over and shuffled, then how much of a greater chance is there in drawing a spade over drawing a 7 (there are 2 spades and one 7)

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.