NCERT Class 9
Between two rational numbers (A) there is no rational number
27
Jun
Between two rational numbers (A) there is no rational number Between two rational numbers (A) there is no rational number June 27, 2021 Category: Chapter 1 - Number Systems , Maths , NCERT Class 9 ,
Every rational number is (a) a natural number (b) an integer
27
Jun
Every rational number is (a) a natural number (b) an integer Every rational number is (a) a natural number (b) an integer June 27, 2021 Category: Chapter 1 - Number Systems , Maths , NCERT Class 9 ,
13. In Q.1, Exercise 14.2, you were asked to prepare a frequency distribution table regarding the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at random, has blood group AB.
17
Oct
13. In Q.1, Exercise 14.2, you were asked to prepare a frequency distribution table regarding the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at random, has blood group AB. 13. In Q.1 Exercise 14.2 has blood group AB. selected at [...]
12. In Q.5, Exercise 14.2, you were asked to prepare a frequency distribution table, regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table, find the probability of the concentration of sulphur dioxide in the interval 0.12-0.16 on any of these days.
17
Oct
12. In Q.5, Exercise 14.2, you were asked to prepare a frequency distribution table, regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table, find the probability of the concentration of sulphur dioxide in the interval 0.12-0.16 on any of these days. [...]
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12. In Q.5 ,
Exercise 14.2 ,
find the probability of the concentration of sulphur dioxide in the interval 0.12-0.16 on any of these days. ,
regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table ,
you were asked to prepare a frequency distribution table ,
11. Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg): 4.97 5.05 5.08 5.03 5.00 5.06 5.08 4.98 5.04 5.07 5.00 Find the probability that any of these bags chosen at random contains more than 5 kg of flour.
17
Oct
11. Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg): 4.97 5.05 5.08 5.03 5.00 5.06 5.08 4.98 5.04 5.07 5.00 Find the probability that any of these bags chosen at random contains more than 5 kg of flour. 1. In a cricket match 11. Eleven [...]
10. Activity : Ask all the students in your class to write a 3-digit number. Choose any student from the room at random. What is the probability that the number written by her/him is divisible by 3? Remember that a number is divisible by 3, if the sum of its digits is divisible by 3.
17
Oct
10. Activity : Ask all the students in your class to write a 3-digit number. Choose any student from the room at random. What is the probability that the number written by her/him is divisible by 3? Remember that a number is divisible by 3, if the sum of its digits is divisible by 3. [...]
9. Activity : Note the frequency of two-wheelers, three-wheelers and four-wheelers going past during a time interval, in front of your school gate. Find the probability that any one vehicle out of the total vehicles you have observed is a two-wheeler.
17
Oct
9. Activity : Note the frequency of two-wheelers, three-wheelers and four-wheelers going past during a time interval, in front of your school gate. Find the probability that any one vehicle out of the total vehicles you have observed is a two-wheeler. 9. Activity : Note the frequency of two-wheelers in front of your school gate. [...]
8. Refer to Q.2, Exercise 14.2. What is the empirical probability that an engineer lives: (i) less than 7 km from her place of work? (ii) more than or equal to 7 km from her place of work? (iii) Within ½ km from her place of work?
17
Oct
8. Refer to Q.2, Exercise 14.2. What is the empirical probability that an engineer lives: (i) less than 7 km from her place of work? (ii) more than or equal to 7 km from her place of work? (iii) Within ½ km from her place of work? 1. In a cricket match 8. Refer to [...]
7. To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table. Opinion Number of students like 135 dislike 65 Find the probability that a student chosen at random (i) likes statistics, (ii) does not like it.
17
Oct
7. To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table. Opinion Number of students like 135 dislike 65 Find the probability that a student chosen at random (i) likes statistics, (ii) does not like it. 1. In a [...]
6. Refer to Table 14.7, Chapter 14. (i) Find the probability that a student obtained less than 20% in the mathematics test. (ii) Find the probability that a student obtained marks 60 or above.
17
Oct
6. Refer to Table 14.7, Chapter 14. (i) Find the probability that a student obtained less than 20% in the mathematics test. (ii) Find the probability that a student obtained marks 60 or above. 6. Refer to Table 14.7 Chapter 14. (i) Find the probability that a student obtained less than 20% in the mathematics [...]