A number is chosen at random from the set of numbers, {21,22,23,24,……………34,35}. What is the probability that it is
i) a multiple of 4
ii) a prime number.

How do you use the elimination method for this question? explain, because i really want to understand!

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?

One file clerk can file 10 folders per minute. a second file clerk can file 11 folders per minute. how many minutes would the two clerks together take to file 672 folders?