Posted by **Amy** on Wednesday, October 30, 2013 at 9:52pm.

Are these using nCr? If not what formula do I use?

P(20,x,23)=

P(x.23)=

## Answer this Question

## Related Questions

- math - proof thise for me. nCr=nCr-r 2) nCr+nCr+1=n+1Crr+1
- math - prove:1) nCr=nCr-r 2) nCr+nCr+1=n+1Crr+1
- math - Use the formula nCr to solve Of the 100 people in the U.S. senate, 18 ...
- m ath - Use the formula nCr to solve Of the 100 people in the U.S. senate, 18 ...
- math - how do you calculate combinations [C(6,2)] without using a calculator. I ...
- Statistics formula - Which stats formula would i use for the following: Using ...
- English - Mandy interviewed a source who told about how she was illegally ...
- Math - Can you check my work Please? Let N(t) be the number of bacteria after t ...
- Math - Alex's favorite restaurant is a buffet-style Chinese restaurant downtown...
- College Math II - Solve by using the quadratic formula. x^2 + 6x + 6 = 0 I am ...