<span>5 n C r 3 = 10 </span><span>がんばってね</span>
For the first digit you are choosing from 2 digits
for the second digit you are choosing from 2 digits
for the third digit you are choosing from 2 digits
2*2*2=8
111
110
011
101
000
001
100
010
However......
A number doesn't usually start with a 0 or 0s.
Therefore, if you want 3-digit numbers and not just permutations using 0 and 1, then you must eliminate
011, 000, 001, and 010
Seeing that the first digit can't be 0, you choose from 1, then 2, and then 2 digits again; 1*2*2=4 numbers
You choose which answer best suits your problem.
It would take both Hannah and destiny 28 hours to paint the room together
Answer:
x = 4
Step-by-step explanation:
(8)(7) = 14x
14x = 56
x = 4
