NCERT Class 10
(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 [...]
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? ,
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 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 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 [...]
A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be (i) red ? (ii) white ? (iii) not green?
06
Oct
A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be (i) red ? (ii) white ? (iii) not green? 8 white marbles and 4 green marbles. One marble is taken out [...]
A bag contains 3 red balls and 5 black balls. A ball drawn at random from the bag. What is the probability that the ball drawn is (i) red ? (ii) not red ?
06
Oct
A bag contains 3 red balls and 5 black balls. A ball drawn at random from the bag. What is the probability that the ball drawn is (i) red ? (ii) not red ? A bag contains 3 red balls and 5 black balls. A ball drawn at random from the bag. What is the [...]
It is given that in a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday?
06
Oct
It is given that in a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday? It is given that in a group of 3 students the probability of 2 students not having the same birthday is [...]
A bag contains lemon flavoured candies only. Malini takes out one candy without looking into the bag. What is the probability that she takes out (i) an orange flavoured candy (ii) a lemon flavoured candy
06
Oct
A bag contains lemon flavoured candies only. Malini takes out one candy without looking into the bag. What is the probability that she takes out (i) an orange flavoured candy (ii) a lemon flavoured candy A survey regarding the height (in cm) of 51 girls of class X of a school was conducted and the [...]