Chapter 15 – Probability
13. If x represents the mean of n observations x1, x2, …, xn, then value of
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Jul
13. If x represents the mean of n observations x1, x2, …, xn, then value of ... 13. If x represents the mean of n observations x1 then value of x+2 xn July 3, 2021 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 9 ,
12. If the mean of the observations : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of the last three observations is
03
Jul
12. If the mean of the observations : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of the last three observations is 12. If the mean of the observations : x the mean of the last three observations is x + 10 is 9 x + [...]
11. The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is :
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Jul
11. The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is : 11. The mean of five numbers is 30. If one number is excluded their mean becomes 28. The excluded number is : July 3, 2021 Category: Chapter 14 - Statistics , Chapter 15 [...]
10. To draw a histogram to represent the following frequency distribution :
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Jul
10. To draw a histogram to represent the following frequency distribution : 10. To draw a histogram to represent the following frequency distribution : July 3, 2021 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 9 ,
9. A grouped frequency distribution table with classes of equal sizes using 63-72 (72 included) as one of the class is constructed for the following data :
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Jul
9. A grouped frequency distribution table with classes of equal sizes using 63-72 (72 included) as one of the class is constructed for the following data : 9. A grouped frequency distribution table with classes of equal sizes using 63-72 (72 included) as one of the class is constructed for the following data : July [...]
8. A grouped frequency table with class intervals of equal sizes using 250-270 (270 not included in this interval) as one of the class interval is constructed for the following data :
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Jul
8. A grouped frequency table with class intervals of equal sizes using 250-270 (270 not included in this interval) as one of the class interval is constructed for the following data : 8. A grouped frequency table with class intervals of equal sizes using 250-270 (270 not included in this interval) as one of the [...]
7. In the class intervals 10-20, 20-30, the number 20 is included in :
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Jul
7. In the class intervals 10-20, 20-30, the number 20 is included in : 20-30 7. In the class intervals 10-20 the number 20 is included in : July 3, 2021 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 9 ,
6. The class marks of a frequency distribution are given as follows : 15, 20, 25, … The class corresponding to the class mark 20 is :
03
Jul
6. The class marks of a frequency distribution are given as follows : 15, 20, 25, … The class corresponding to the class mark 20 is : ... The class corresponding to the class mark 20 is : 20 25 6. The class marks of a frequency distribution are given as follows : 15 July [...]
5. Let m be the mid-point and l be the upper class limit of a class in a continuous frequency distribution. The lower class limit of the class is :
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Jul
5. Let m be the mid-point and l be the upper class limit of a class in a continuous frequency distribution. The lower class limit of the class is : 5. Let m be the mid-point and l be the upper class limit of a class in a continuous frequency distribution. The lower class limit [...]
4. The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest class is 10. The upper class-limit of the highest class is:
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Jul
4. The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest class is 10. The upper class-limit of the highest class is: 4. The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest [...]