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CBSE Questions

Total Questions 9982
a box contains 12 balls out of which x are black. if one ball is drawn at random from the box, what is the probability that it will be a black ball? if 6 more black balls are put in the box, the probability of drawing a black ball now is double of what it was before. find x.
three consecutive vertices of a parallelogram ABCD are A(1,2) B(1,0) and C(4,0). find the fourth vertex D
Why is the Indian constitution called a living document
Essay on sanitation
Who are Neil Armstrong and Edwin Aldrin ?
the ticket receipts at the show of a film amounted to rs. 6500 on the first day and showed a drop of rs. 110 every succeeding day. if the operational expenses of the show are rs. 1000 a day. find on which day the show ceases to be profitable ?
determine the ratio in which the line 2x + y - 4 = 0 divides the line segment joining the points (2,-2) and (3,7)
a person has a rectangular garden whose area is 100 sq m. he fences three sides of the garden with 30 m barbed wire. on the fourth side, the wall of his house is constructed, find the dimensions of the garden.
the points A(2,9), B(a,5), C(5,5) are the vertices of a triangle ABC, right angled at b. find the value of a and hence the area of ABC
a bag contains 5 red balls and some blue balls. if the probability of drawing a blue ball is thrice that of red ball, find the number of blue balls in the bag?
the radius of the wheels of a bus is 70 cm, how many revolutions per minute must a wheel make in order to move at a speed of 66 km/hr?
what will be the increase in area of circle if its radius is increased by 40% ?
the volume of a largest sphere that can be cut from cylindrical log of wood of base radius 1 m and height 4 m is a) 8/3 * 22/7 cubic meter b) 10/3 * 22/7 cubic meter c) 16/3 * 22/7 cubic meter d) 4/3 * 22/7 cubic meter
How can a cactus store water in it's stem?
the houses of a row are numbered consecutively from 1-49 .Show that there is a value to x such that the sum of the house preceding the house no;x is equal to the sum of the numbers of the houses following it.find x
ABO blood types-parents and children blood group?
ABO blood types-parents and children blood group?
During heavy rain in the village the rainwater carry excessive fertilizers to a pond. How long it will affect the fish population in the long run?
k^x^-2(k-1)x+4=0
state the positions of isotopes of the same element in the modern periodic table