We must find UNIQUE combinations because choosing a,b,c,d... is the same as d,c,b,a...etc. For this type of problem you use the "n choose k" formula...
n!/(k!(n-k)!), n=total number of choices available, k=number of choices made..
In this case:
20!/(10!(20-10)!)
20!/(10!*10!)
184756
On brainly, i don’t think you can delete questions. but you can just ignore them
Answer:
$8
Step-by-step explanation:
14 - 6 = 8
The 50 is the error because cents are represented with decimals so it has to be .50
