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1.   A scientist counted birds in a cornfield. He counted fifteen crows, sixteen jays and three hawks. What was the ratio of hawks to crows?

2.   You have the set of numbers {-9, -3, -7, 5, 4, 8, 2, -4, -8, -2, 10}. What is the ratio of positive numbers to negative numbers?

3.   Cody has just started his collection of plastic cars and obtained twenty-one new plastic cars. Steven has fifty-six old plastic cars. Jacob has one hundred sixteen old plastic cars. If all their collections were combined, what would be the ratio of old plastic cars to new plastic cars? Reduce your answer to a ratio of the form X:1 and round X to the nearest tenth.

4.   After doing an experiment you learn that 44 percent of the carrot seeds from company A germinated (began to grow) within ten days, while only 36 percent of the seeds from company B germinated within ten days. What was the comparative germination ratio?

5.   One group (A) contains 170 people. One-fifth of the people in group A will be selected to win free tickets to a concert. There is another group (B) in a nearby town that will receive the same number of tickets, but there are 380 people in that group. What will be the ratio of non-winners in group A to non-winners in group B after the selections are made?

6.   The local election is over and a new mayor has been elected to lead Big Town. The new mayor received three votes for every vote received by her opponent. The new mayor received 4,221 votes. How many votes did her opponent receive?


 


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