S+9
More than suggests addition.
There are 26 letters in the alphabet, 5 are vowels, therefore, the probability of choosing a vowel the first time is:
![\frac{5}{26},](https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B26%7D%2C)
and the second time is:
![\frac{4}{25}\text{.}](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B25%7D%5Ctext%7B.%7D)
Continuing with this reasoning, we get that the probabilities each time are:
![\frac{5}{26},\frac{4}{25},\frac{3}{24},\frac{2}{23}\text{.}](https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B26%7D%2C%5Cfrac%7B4%7D%7B25%7D%2C%5Cfrac%7B3%7D%7B24%7D%2C%5Cfrac%7B2%7D%7B23%7D%5Ctext%7B.%7D)
Finally, the probability that you get all vowels is the product of the probabilities:
![\frac{1}{2990}\text{.}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2990%7D%5Ctext%7B.%7D)
Writing the above result as a percentage we get:
![0.033\%.](https://tex.z-dn.net/?f=0.033%5C%25.)
Answer:
Answer:
The number is 86
Step-by-step explanation:
Let the number be
, then the reverse is ![yx](https://tex.z-dn.net/?f=yx)
The sum of the reversed number and the original number is 154,
![\implies (10x+y)+(10y+x)=154](https://tex.z-dn.net/?f=%5Cimplies%20%2810x%2By%29%2B%2810y%2Bx%29%3D154)
We simplify this to get:
....eqn(1)
If the ones digit in it is 2 less than the tens digit, then
....eqn(2)
Putt equation (2) in (1)
![\implies 11x+11(x-2)=154](https://tex.z-dn.net/?f=%5Cimplies%2011x%2B11%28x-2%29%3D154)
![\implies 11x+11x-22=154](https://tex.z-dn.net/?f=%5Cimplies%2011x%2B11x-22%3D154)
![\implies 11x+11x=154+22](https://tex.z-dn.net/?f=%5Cimplies%2011x%2B11x%3D154%2B22)
![\implies 22x=176](https://tex.z-dn.net/?f=%5Cimplies%2022x%3D176)
![\implies x=8](https://tex.z-dn.net/?f=%5Cimplies%20x%3D8)
Put x=8 in the second equation:
![y=8-2=6](https://tex.z-dn.net/?f=y%3D8-2%3D6)
The original number is 86
4 legged tables : x
3 legged stools : y
x + y = 20 y= 20 - x
4x + 3y = 68
Replace y by 20 - x so we only have one letter
4x + 3(20 - x) =68
4x + 60 - 3x =68
x + 60 = 68
x = 8
To find y replace x by 8
y = 20 - 8
y = 12
So you have 8 four legged chairs and 12 three legged stools.
Hope I helped!
I think it is 40x16=640
Answer = 64:0