V1=2×3×1=6
V2=1×2×1=2
V=6+2=8
S=(3×1)+(3×1)+(2×1)+1+(2×1)+1+(3×2)+(3×2)+(1×2)+(1×2)=28
-3,32х-0,132=0,138 +7,48х
-0,132-0,138 =7,48х+3,32х
Ответ:
![\dfrac{1}{22}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B22%7D)
Пошаговое объяснение:
![P=\dfrac{A}{N}](https://tex.z-dn.net/?f=P%3D%5Cdfrac%7BA%7D%7BN%7D)
<u><em>Первое</em></u><em> испытание:</em>
![A=5\\N=12\\=>P=\dfrac{5}{12}](https://tex.z-dn.net/?f=A%3D5%5C%5CN%3D12%5C%5C%3D%3EP%3D%5Cdfrac%7B5%7D%7B12%7D)
<u><em>Второе</em></u><em> испытание:</em>
![A=4\\N=11\\=>P=\dfrac{4}{11}](https://tex.z-dn.net/?f=A%3D4%5C%5CN%3D11%5C%5C%3D%3EP%3D%5Cdfrac%7B4%7D%7B11%7D)
<u><em>Третье</em></u><em> испытание:</em>
![A=3\\N=10\\=>P=\dfrac{3}{10}=0.3](https://tex.z-dn.net/?f=A%3D3%5C%5CN%3D10%5C%5C%3D%3EP%3D%5Cdfrac%7B3%7D%7B10%7D%3D0.3)
Перемножим вероятности:
![\dfrac{5}{12}\times \dfrac{4}{11} \times 0.3 = \dfrac{1}{22}](https://tex.z-dn.net/?f=%5Cdfrac%7B5%7D%7B12%7D%5Ctimes%20%5Cdfrac%7B4%7D%7B11%7D%20%5Ctimes%200.3%20%3D%20%5Cdfrac%7B1%7D%7B22%7D)
A) 2/3 < 5/6
2/3=4/6 4/6 < 5/6
б) 2/3 >4/12
2/3=8/12 8/12>4/12
в) 3/4 >5/8
3/4=6/8 6/8>5/8
1)36*14=504 (м) - в купейных вагонах.
2) 504:12=42 (м) - в плацкартном вагоне.