Maths-
General
Easy
Question
The number of ways in which we can choose 6 chocolates out of 8 different brands available in the market is
The correct answer is:
consider 8 different brands to be beggar and compute the distribution of 6 identical things among 8 people each receiving none, one or more. Alternatively find co-efficient of x6 in 
Related Questions to study
Maths-
If three one by one squares are selected at random from the chessboard, then probability that they form the letter 'L' is
If three one by one squares are selected at random from the chessboard, then probability that they form the letter 'L' is
Maths-General
Physics-
When a body is thrown with a velocity u making an angle q with the horizontal plane, the maximum distance covered by it in horizontal direction is :
When a body is thrown with a velocity u making an angle q with the horizontal plane, the maximum distance covered by it in horizontal direction is :
Physics-General
Maths-
The probability of selecting two small squares on a chess board having a contact at corner is
The probability of selecting two small squares on a chess board having a contact at corner is
Maths-General
Maths-
A bag contains some white and some black balls, all cominatitions of balls being equally likely. The total number of balls in the bag is 10. If three balls are drawn at random without replacement and all of them are found to be black, the probability that the bag contains 1 white and 9 black balls is
A bag contains some white and some black balls, all cominatitions of balls being equally likely. The total number of balls in the bag is 10. If three balls are drawn at random without replacement and all of them are found to be black, the probability that the bag contains 1 white and 9 black balls is
Maths-General
Maths-
Two real numbers x,y are chosen from the interval [0, 8] then the probability that 
is
Two real numbers x,y are chosen from the interval [0, 8] then the probability that is
Maths-General
Maths-
The locus of the centre of a circle which cuts orthogonally the parabola 
will pass through point
The locus of the centre of a circle which cuts orthogonally the parabola will pass through point
Maths-General
Maths-
Consider the parabola 
Let P=(a,b) be any fixed point inside the parabola and let S be the focus of the parabola. Then the minimum value of SQ + PQ as point Q moves on the parabola is
Consider the parabola Let P=(a,b) be any fixed point inside the parabola and let S be the focus of the parabola. Then the minimum value of SQ + PQ as point Q moves on the parabola is
Maths-General
Physics-
An athlete completes one round of a circular track of radius 10 m in 40 sec. The distance covered by him in 2 min 20 sec is :
An athlete completes one round of a circular track of radius 10 m in 40 sec. The distance covered by him in 2 min 20 sec is :
Physics-General
Physics-
Assertion: The binding energy of a satellite does not depend upon the mass of the satellite.
Reason : Binding energy is the negative value of total energy of satellite.
Assertion: The binding energy of a satellite does not depend upon the mass of the satellite.
Reason : Binding energy is the negative value of total energy of satellite.
Physics-General
Physics-
Assertion: There is no effect of rotation of earth on acceleration due to gravity at poles.
Reason : Rotation of earth is about polar axis.
Assertion: There is no effect of rotation of earth on acceleration due to gravity at poles.
Reason : Rotation of earth is about polar axis.
Physics-General
Physics-
What does not change in the field of central force
What does not change in the field of central force
Physics-General
physics-
The earth E moves in an elliptical orbit with the sun S at one of the foci as shown in figure. Its speed of motion will be maximum at the point-
The earth E moves in an elliptical orbit with the sun S at one of the foci as shown in figure. Its speed of motion will be maximum at the point-
physics-General
Physics-
Kepler’s second law regarding constancy of aerial velocity of a planet is a consequence of the law of conservation of-
Kepler’s second law regarding constancy of aerial velocity of a planet is a consequence of the law of conservation of-
Physics-General
Physics-
A geo-stationary satellite is orbiting the earth at a height of 6R above the surface of earth, R being the radius of earth. The time period of another satellite at a height of 2.5R from the surface of earth is :
A geo-stationary satellite is orbiting the earth at a height of 6R above the surface of earth, R being the radius of earth. The time period of another satellite at a height of 2.5R from the surface of earth is :
Physics-General
Physics-
Two satellites A and B go round a planet P in circular orbits having radii 4R and R respectively. If the speed of the satellite A is 3V, the speed of the satellite B will be.
Two satellites A and B go round a planet P in circular orbits having radii 4R and R respectively. If the speed of the satellite A is 3V, the speed of the satellite B will be.
Physics-General
