Eli takes a typing test and types all 300 words in 1/10 of an hour. he takes the test a second time and types the words in one 12th of an hour. was he faster slower on the second attempt.

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.