Your research firm has found that staries for retail cashiers have a normal distrbution with a mean of $16.305 per year and standard deviation of $1.412. find the probability that a randomly selected retail cashier has a salary between 513.902 and 519.630 per year 0.252 0.4013 0.9544 0.0228 0.9772

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.