Solve please thanks so much

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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.

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent