NCERT Class 9
Two sections of Class IX having 30 students each appeared for mathematics olympiad. The marks obtained by them are shown below: Construct a group frequency distribution of the data above using the classes 0-9, 10-19 etc., and hence find the number of students who secured more than 49 marks.
04
Jul
Two sections of Class IX having 30 students each appeared for mathematics olympiad. The marks obtained by them are shown below: Construct a group frequency distribution of the data above using the classes 0-9, 10-19 etc., and hence find the number of students who secured more than 49 marks. The class-mark of the class 130-150 [...]
Following is the frequency distribution of total marks obtained by the students of different sections of Class VIII. Draw a histogram for the distribution above.
04
Jul
Following is the frequency distribution of total marks obtained by the students of different sections of Class VIII. Draw a histogram for the distribution above. Following is the frequency distribution of total marks obtained by the students of different sections of Class VIII. Draw a histogram for the distribution above. July 4, 2021 Category: Chapter [...]
Here is an extract from a mortality table. (i) Based on this information, what is the probability of a person ‘aged 60’ of dying within a year? (ii) What is the probability that a person ‘aged 61’ will live for 4 years?
04
Jul
Here is an extract from a mortality table. (i) Based on this information, what is the probability of a person ‘aged 60’ of dying within a year? (ii) What is the probability that a person ‘aged 61’ will live for 4 years? Here is an extract from a mortality table. (i) Based on this information [...]
The following observations are arranged in ascending order : 26, 29, 42, 53, x, x + 2, 70, 75, 82, 93 If the median is 65, find the value of x.
04
Jul
The following observations are arranged in ascending order : 26, 29, 42, 53, x, x + 2, 70, 75, 82, 93 If the median is 65, find the value of x. 29 42 53 70 75 82 93 If the median is 65 find the value of x. The following observations are arranged in ascending [...]
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The following observations are arranged in ascending order : 26 ,
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Heights (in cm) of 30 girls of Class IX are given below: Prepare a frequency distribution table for this data.
04
Jul
Heights (in cm) of 30 girls of Class IX are given below: Prepare a frequency distribution table for this data. Heights (in cm) of 30 girls of Class IX are given below: Prepare a frequency distribution table for this data. July 4, 2021 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths [...]
Consider the data : 2, 3, 9, 16, 9, 3, 9. Since 16 is the highest value in the observations, is it correct to say that it is the mode of the data? Give reason.
04
Jul
Consider the data : 2, 3, 9, 16, 9, 3, 9. Since 16 is the highest value in the observations, is it correct to say that it is the mode of the data? Give reason. 16 … 3% 9 9. Since 16 is the highest value in the observations Consider the data : 2 is [...]
In a histogram, the areas of the rectangles are proportional to the frequencies. Can we say that the lengths of the rectangles are also proportional to the frequencies?
04
Jul
In a histogram, the areas of the rectangles are proportional to the frequencies. Can we say that the lengths of the rectangles are also proportional to the frequencies? In a histogram the areas of the rectangles are proportional to the frequencies. Can we say that the lengths of the rectangles are also proportional to the [...]
The mean of the data : 2, 8, 6, 5, 4, 5, 6, 3, 6, 4, 9, 1, 5, 6, 5 is given to be 5. Based on this information, is it correct to say that the mean of the data: 10, 12, 10, 2, 18, 8, 12, 6, 12, 10, 8, 10, 12, 16, 4 is 10? Give reason.
04
Jul
The mean of the data : 2, 8, 6, 5, 4, 5, 6, 3, 6, 4, 9, 1, 5, 6, 5 is given to be 5. Based on this information, is it correct to say that the mean of the data: 10, 12, 10, 2, 18, 8, 12, 6, 12, 10, 8, 10, 12, 16, [...]
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A die is thrown 1000 times and the outcomes were recorded as follows : If the die is thrown once more, then the probability that it shows 5 is :
04
Jul
A die is thrown 1000 times and the outcomes were recorded as follows : If the die is thrown once more, then the probability that it shows 5 is : A die is thrown 1000 times and the outcomes were recorded as follows : If the die is thrown once more then the probability that [...]
The class-mark of the class 130-150 is :
04
Jul
The class-mark of the class 130-150 is : The class-mark of the class 130-150 is : July 4, 2021 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 9 ,