What row of pascal's triangle should be used when looking for the number of ways 15 students can be selected from a class of 32 students? a) 14 b) 15 c) 31 d) 32

An animal shelter has 21 puppies. if the puppies are 28% of the total dogs and cat population how many dogs and cats are in the animal shelter

The sum of two numbers is 12 and their difference is 18 what are the two numbers

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum