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A ball is drawn at random from a bag containing 3 balls and it is found to be black. If it is equally likely that it may contain 1 or 2 or 3 black balls, the probability that the ball drawn is the only black ball is...is the ...

draw d graph of [y]=[x]... ...

please solve it asap *Image* x ...

*Image* Q3. A man is running on horizontal road with speed 2km/hr, he finds that rain is falling at θ = tan-1(1/2) with vertical. If he starts running in opposite direction with speed 4km/hr, then the rain will appear to fal ...

It is given that tan A and tan B are the roots of t2-pt+q=0. Find in terms of p and q: i) sin2(A+B) ii)cos 2(A+B) ...

Assuming that deviation from standard conditions is unimportant in this case and that all these redox reactions go essentially to completion. Given: [Zn(CN)4]2- + 2 e- ------- Zn + 4 CN- E = -1.26 V [Au(CN)2]- + e- -------- A ...

A sample containing H3PO4 and P4O10 is labelled in the analogous manner as oleum. The mass of P4O10 in a sample labelled as 127%, would be ? ...

Q1 f:R→ R ;f(x) is continuous funciton satisfying f(x)+f(x2)=2 for all x ε R,the f(x) is a)into b)many one c)constatn d)periodic Q2 If [x] denotes GINT and f(x) =[n+p.sinx],0<x<π ,n ε I and p is a prime no., If p=1 ...

The vapor pressure lowering of 0.1M aqueous solution of non electrolyte at 75° C is ? ( ΔHv of water =9720 cal/mol and antilog 0.407=2.55) ...

plz provide me a sert of readings in which u get balanicing length 45cm to 55 cm.....plz it is from cbse practicals............n i need it urgent i have practicals tomorrow..........thanx ...

1. If a,b are the roots of x2=x+1 , prove that a5=5a+3 2. Two candidates attempt to solve a quadratic eqn of the form x2+px+q=0 . One starts with a wrong value of p and finds the roots to be 2 and 6. The other starts with a w ...

someone plzz see the miscelaaneous exercise on chapter8, q no.10, ncert for class XII.... the ans is wrong at the back of ncert...it ought to be 5/6 ...

1 metre long tube, closed at both ends, is lying horizontally. A mercury column of length 0.1 m is filled in its middle and in the rest two parts air is filled at atmospheric pressure. What will be the displacement of the mer ...

A)NH3+NaOCl→ p)N2H4 B)NH4NO2+NaOH→ q)N2 C)NH4NO3+Ca(OH)2→ r)NH3 D)(NH4)2Cr2O7→ s)H2O in all reactions heating is done. ...

Q1 The closest distance b/w 2 atoms among these unit cells (assuming edge length =a in eache cell) a)diamond b)FCC Q2 When NH4Cl is dissolved in H2O ,the temp of H2O decreases hten a)ΔHs>0,ΔHi<ΔHh b)ΔHs<0,ΔHi< ...

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*Image* answer should be b,c both na.....???? ...

Q1. Let f(x) = ax^4+bx^3+cx^2+dx+e where a,b,c,d,e\; \; \epsilon \; R , a≠0, b2>8ac/3 and g(x) = lf(lxl)l , then maximum possible no. of points at which g(x) is non-differentiable is _______ Q2. \int_{0}^{\infty }{\left[ ...

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1) angular speed of a planet is smallest at farthest point form sun in elliptical orbit 2) angular velocity is characterisitc of rigid body at a whole 3) Two binary starts having mass Ma and Mb and radius Ra and Rb moving in ...

*Image* yaar i m getting answer as 2(H1-H2)*Navogadro/N0 but answer given is 2(H2-H1)*Navogadro/N0......... wat is correct me or book???? ...

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a set of orbitals is called degenrate if they have same wave functions....true /false? ...

Out of the following, the correct option about the stability of given complexes 1. NiCl4-2 > PtCl4-2 2.PdCl42-> PtCl42- 3. [Ni(CO)4] = [Ni(CN)4]-2 4.PtCl4-2> PdCl4-2 ...

\\\texttt{If} \: f_{n}=\sum_{k=0}^{n}\binom{n-k}{k} \\\texttt{evaluate}\\ \\ \begin{vmatrix} f_{n}& f_{n+1}&f_{n+2} \\ f_{n+1}& f_{n+2}&f_{n+3}\\ f_{n+2}&f_{n+3}& f_{n+4} \end{vmatrix} ...

prove: \frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{n} is not an integer for any value of n. ...

find dy/dx where y=tan-1(2x/(1-x2)) ...

find dy/dx where y=sec-1x2 ...

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find dy/dx at x=e, y=e2x/logx ...