MCQ
$\frac{d}{{dx}}\left( {{{\sin }^{ - 1}}x + {{\cos }^{ - 1}}x} \right) = ......\left( {\left| x \right| < 1} \right)$
- ✓$0$
- B$\frac{2}{{\sqrt {1 - {x^2}} }}$
- C$\frac{1}{{\sqrt {1 - {x^2}} }}$
- Dઅસ્તિત્વ નથી
$\frac{d}{{dx}}\left( {{{\sin }^{ - 1}}x + {{\cos }^{ - 1}}x} \right) = \frac{d}{{dx}}\left( {\frac{\pi }{2}} \right) = 0$
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($1$) Let $p_i$ be the probability that a randomly chosen point has $i$ many friends, $i=0,1,2,3,4$. Let $X$ be a random variable such that for $i=0,1,2,3,4$, the probability $P(X=i)=p_i$. Then the value of $7 E(X)$ is
($2$) Two distinct points are chosen randomly out of the points $A_1, A_2, \ldots, A_{4 g}$. Let $p$ be the probability that they are friends. Then the value of $7 p$ is