- A$\frac{71}{220}$
- B$\frac{73}{220}$
- C$\frac{79}{220}$
- D$\frac{83}{220}$
Solving corresponding equations
$\frac{x^2}{8}+\frac{y^2}{20}=1 y^2=5 x$
$x=2$
$y= \pm \sqrt{10}$
$X=\{(1,1),(1,0),(1,-1),(1,2),(1,-2),(2,3),(2,2),(2,1),(2,0),(2,-1),(2,-2),(2,-3)\}$
(image)
Let $\mathrm{S}$ be the sample space $\mathrm{E}$ be the event $\mathrm{n}(\mathrm{S})={ }^{12} \mathrm{C}_3$
For $E$
Selecting $3$ points in which $2$ points are either or $\mathrm{x}=1$ $\mathrm{x}=2$ but distance $\mathrm{b} / \mathrm{w}$ then is even
Triangles with base $2$ :
$=3 \times 7+5 \times 5=46$
Triangles with base $4$ :
$=1 \times 7+3 \times 5=22$
Triangles with base $6$ :
$=1 \times 5=5$
$P(E)=\frac{46+22+5}{{ }^{12} C_3}=\frac{73}{220}$
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$S:$ $\sin x$ અને $cos\,x$ એ અંતરાલ $\left( {{\pi \over 2},\pi } \right)$ માં ઘટતા વિધેય છે.
$R:$ જો વિકલનીય વિધેય અંતરાલ $(a, b)$ માં ઘટતું હોય તો તેનું વિકલીત પણ અંતરાલ $(a,b)$ માં પણ ઘટતું વિધેય બને.
આપેલ પૈકી ક્યૂ વિધાન સત્ય થાય .