Chapter 15 – Probability
Refer to Example 13. (i) Complete the following table: (ii) A student argues that ‘there are 11 possible outcomes 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. Therefore, each of them has a probability 1/11. Do you agree with this argument? Justify your answer.
06
Oct
Refer to Example 13. (i) Complete the following table: (ii) A student argues that ‘there are 11 possible outcomes 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. Therefore, each of them has a probability 1/11. Do you agree with this argument? Justify your answer. 10 11 and 12. Therefore 3% 4 [...]
A lot consists of 144 ball pens of which 20 are defective and others are good. Nuri will buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that (i) She will buy it (ii) She will not buy it.
06
Oct
A lot consists of 144 ball pens of which 20 are defective and others are good. Nuri will buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that (i) She will buy it (ii) She will not buy it. A die is thrown [...]
Suppose you drop a die at random on the rectangular region shown in fig. What is the probability that it will land inside the circle with diameter 1 m?
06
Oct
Suppose you drop a die at random on the rectangular region shown in fig. What is the probability that it will land inside the circle with diameter 1 m? Suppose you drop a die at random on the rectangular region shown in fig. What is the probability that it will land inside the circle with [...]
A child has a die whose six faces show the letters as given below : A B C D E A The die is thrown once. What is the probability of getting i) A ? ii) D ?
06
Oct
A child has a die whose six faces show the letters as given below : A B C D E A The die is thrown once. What is the probability of getting i) A ? ii) D ? A child has a die whose six faces show the letters as given below : A B [...]
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears (i) a two digit number (ii) a perfect square number (iii) a number divisible by 5.
06
Oct
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears (i) a two digit number (ii) a perfect square number (iii) a number divisible by 5. A box contains 90 discs which are numbered from 1 to [...]
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? Suppose the bulb selected in the previous case 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
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? Suppose the bulb selected in the previous case is not defective and is not replaced. Now one bulb is selected at random from the rest. What is the [...]
(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 [...]