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
Answer:
Step-by-step explanation
just plug in 0 for z so it would change to -2<6
4. Period with the digits 913 is called thousands period.
5. The digit in the ten thousand place is 1.
6. The value of 9 is hundred thousands.
Hope it will help you :)
We can help you and somebody can help you with calculator
For the second question (5/6)/(4) is the same as (5/6)*(1/4) so just multiply across and you get (5/24)
