Answer:
what are the drop down words.
Answer:
First and last
Step-by-step explanation:
nCr(20, 2) = 190 ways of selecting 2 from 20
nCr(10, 1) = 10 ways of selecting 1 from 10
To find the over all probability of winning,
Calculate the Harmonic Mean (19) and divide by 2
Equivalent to
1/ (1//190 + 1/10) =9.5
So the probability is 1/9.5 = 2/19.
Answer:
34/40
????????
Step-by-step explanation:
you multiply them both by two??