Respuesta :
After applying combination concept, there 720 ways in which Rayheem can buy different type of sandwich on Monday, on Tuesday and on Wednesday.
What is the combination ?
- A combination is a fine fashion that determines the number of possible arrangements in a collection of particulars where the order of the selection doesn't count.
- In combinations, you can elect the particulars in any order. Combinations can be confused with permutations.
- Combinations are a way to calculate the total issues of an event where order of the issues doesn't count. To calculate combinations, we will use the formula (an) n C r = n!/ r! *( n- r)!, where n represents the total number of particulars, and r represents the number of particulars being chosen at a time. This combinations calculator generates all possible combinations of m rudiments from the set of n rudiments.
So on Monday, he has 10(ten) choices of sandwiches he can buy.
On Tuesday, he has to get a(one) different sandwich than he did on Monday, so he only has 9(nine) sandwiches to choose from (10 choices- 1 from Monday = 9)
On Wednesday, he has to get a(one) different sandwich than he did on either Monday or Tuesday, so he has 8(eight) choices.
Now, we would multiply together 10, 9 and 8, to get 720.
Hence, He has 720 choices.
After applying combination concept, there 720 ways in which Rayheem can buy different type of sandwich on Monday, on Tuesday and on Wednesday.
Learn more about combinations here:
https://brainly.com/question/25821700
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