What do we mean by combinations Explain the meaning of each of the terms in the combinations formula Give an example of its use Choose the correct answer below OA The n represents the number of permutations which includes different orderings The n r xr represents the number of different orderings of n items taken r at a time Dividing n by n r xr determines the number of permutations counting each different ordering which is a combination B The n represents the number of combinations which includes different orderings The n r xr represents the number of different orderings of n items taken r at a time Dividing n by n r xr determines the number of combinations without counting each different ordering which is a permutation OC The n represents the number of permutations not counting different orderings The n r xr represents the number of different orderings of n items taken r at a time Dividing n by n r xr determines the number of permutations counting each different ordering which is a combination OD The n represents the number of permutations which includes different orderings The n r xr represents the number of different orderings of n items taken r at a time Dividing n by n r xr determines the number of permutations without counting each different ordering which is a combination Give an example of its use Select the correct answer below OA The formula can be used when deciding how many ways someone can dial a number on a telephone OB The formula can be used when deciding how many ways the first five letters of the alphabet can be arranged OC The formula can be used when deciding how many ways someone can choose two hats from 10 options D The formula can be used when deciding how many ways someone can choose a vanity license plate