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(i)A lot of 20 bulbs contain 4 defective ones. One bulb is selected at random from the lot. What is the probability that this bulb is defective? (ii)Suppose the bulb selected in the previous case (i) is not defective and is not replaced. Now one bulb is selected at random from the rest. What is the probability that this bulb is not defective?
06
Oct
(i)A lot of 20 bulbs contain 4 defective ones. One bulb is selected at random from the lot. What is the probability that this bulb is defective? (ii)Suppose the bulb selected in the previous case (i) is not defective and is not replaced. Now one bulb is selected at random from the rest. What is [...]
A beam of light consisting of red, green and blue and is incident on a right angled prism. The refractive index of the material of the prism for the above red, green and blue wavelengths
06
Oct
A beam of light consisting of red, green and blue and is incident on a right angled prism. The refractive index of the material of the prism for the above red, green and blue wavelengths A beam of light consisting of red green and blue and is incident on a right angled prism. The refractive [...]
Five cards-the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downwards. One card is then picked up at random. (i) What is the probability that the card is the queen? (ii) If the queen is drawn and put aside, what is the probability that the second card picked up is (a) an ace? (b) a queen?
06
Oct
Five cards-the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downwards. One card is then picked up at random. (i) What is the probability that the card is the queen? (ii) If the queen is drawn and put aside, what is the probability that the second card picked up is [...]
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are well-shuffled with their face downwards. One card is then picked up at random. (i) What is the probability that the card is the queen? (ii) If the queen is drawn and put aside ,
Five cards-the ten ,
jack ,
king and ace of diamonds ,
queen ,
what is the probability that the second card picked up is (a) an ace? (b) a queen? ,
The x-z plane separates two media A and B of refractive indices mu 1 = 1.5 and mu 2 = 2. A ray of light travels from A to B. Its directions in the two media are given by unit vectors
06
Oct
The x-z plane separates two media A and B of refractive indices mu 1 = 1.5 and mu 2 = 2. A ray of light travels from A to B. Its directions in the two media are given by unit vectors The x-z plane separates two media A and B of refractive indices mu 1 [...]
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting (i) a king of red colour (ii) A face card (iii) A red face card (iv) A jack of hearts (v) A spade (vi) the queen of diamonds (vii) Neither a red card nor a queen (viii) A non-face card (ix) a black king or a red queen
06
Oct
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting (i) a king of red colour (ii) A face card (iii) A red face card (iv) A jack of hearts (v) A spade (vi) the queen of diamonds (vii) Neither a red card nor a queen (viii) A non-face [...]
A bird is flying with a velocity v between two long vertical plane mirrors making an angle theta with mirror M1 as shown. Then what will be the relative velocity of approach between
06
Oct
A bird is flying with a velocity v between two long vertical plane mirrors making an angle theta with mirror M1 as shown. Then what will be the relative velocity of approach between A bird is flying with a velocity v between two long vertical plane mirrors making an angle theta with mirror M1 as [...]
A die is thrown once. Find the probability of getting (i) a prime number; (ii) a number lying between 2 and 6; (iii) an odd number.
06
Oct
A die is thrown once. Find the probability of getting (i) a prime number; (ii) a number lying between 2 and 6; (iii) an odd number. A die is thrown once. Find the probability of getting (i) a prime number; (ii) a number lying between 2 and 6; (iii) an odd number. October 6, 2020 [...]
A gun of mass m1 fires a bullet of mass m2 with a horizontal speed v0. The gun is fitted with a concave mirror of focal length f facing toward a receding bullet. Find the speed of separation
06
Oct
A gun of mass m1 fires a bullet of mass m2 with a horizontal speed v0. The gun is fitted with a concave mirror of focal length f facing toward a receding bullet. Find the speed of separation A gun of mass m1 fires a bullet of mass m2 with a horizontal speed v0. The [...]
A game of chance consists of spinning an arrow, which comes to rest pointing at one of the numbers 1,2,3,4,5,6,7,8 and these are equally likely outcomes, Find the probability that it will point at
06
Oct
A game of chance consists of spinning an arrow, which comes to rest pointing at one of the numbers 1,2,3,4,5,6,7,8 and these are equally likely outcomes, Find the probability that it will point at 2 3% 4 5 6 7) 8 and these are equally likely outcomes A game of chance consists of spinning an [...]
Gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a tank containing 5 male fish and 8 female fish. What is the probability that the fish taken out is a male fish?
06
Oct
Gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a tank containing 5 male fish and 8 female fish. What is the probability that the fish taken out is a male fish? A survey regarding the height (in cm) of 51 girls of class X [...]