Exercise 14.4 Q1. The following number of goals were scored by a team in a series of `10` matches         `2, 3, 4, 5, 0, 1, 3, 3, 4, 3`        Find the mean, median, and mode of these scores. Sol. : By arranging the data in ascending order,  `0, 1, 2, 3, 3, 3, 3, 4, 4, 5.` Mean `overlinex=(x_1+x_2+x_3+...+x_10)/10` `(sum_(i=1)^10x_i)/n`  `= (0+1+2+3+3+3+3+4+4+5)/10`  `= 28/10` So, `=2.8` Median`=((n/2)^(th)term+(n/2+1)^(th)term)/2` `=((10/2)^(th)term+(10/2+1)^(th)term)/2` `=(5^(th)term+6^(th)term)/2` `=(3+3)/2=6/2=3` Mode`=`Maximum frequency`=3` Answer: Mean `=2.8` Median `=3` Mode `=3` Q2. In a mathematics test given to `15` students, the following marks (out of `100`) are recorded:         `41, 39, 48, 52, 46, 54, 40, 96, 52, 98, 40, 42, 52, 60`        Find the mean, median, and mode of this data. Sol. : By arranging the data in ascending order `39, 40, 40, 41, 42, 46, 48, 5...

9th Maths Project  Like, Share, and Subscribe.  9th Project Topics 1. Establish Heron's formula to find the area of ​​a triangle. 2. Find the total surface area and volume of a class 9th math book by measuring its length, breadth, and height. 3.  Briefly describe the biography and achievements of any three mathematicians. 4.  By making a polygon, measure all its exterior angles and find their sum. 5.  Explain geometric applications in daily life. 6.  Explain the surface area of a sphere with the help of two examples. 7.  Explain the volume of a sphere with the help of two examples. 8.  Explain the presentation of data with the help of two examples. 9.  Explain the probability with the help of three examples. 10.  Explain the law of exponents for real numbers with the help of two examples. 11.  Explain the solution of a linear equation with the help of two examples. 12.  Explain the polynomials with the help of two examples. 13....

Chapter 14 Statistics NCERT Class 9th solution of Exercise 14.1 NCERT Class 9th solution of Exercise 15.1 NCERT Class 9th Projects Exercise 14.2 Q1. The blood groups of `30` students of Class VIII are recorded as follows: `A, B, O, O, AB, O, A, O, B, A, O, B, A, O, O, A, AB, O, A, A, O, O,` `AB,`` B, ``A, ``O,`` B,`` A, B, O` Represent this data in the form of a frequency distribution table. Which is the most common, and which is the rarest, blood group among these students? Sol. :   Blood group  Number of students  `A`  `09`  `B` `06`   `O` `12`   `AB` `03`    Total `30`   Answer: The most common `O`, and the Rarest `AB` blood group. Q2. The distance (in Km) of `40` engineers from their residence to their place of work were found as follows: 5, 3, 10, 20, 25, 11, 13, 7, 12, 31, 19, 10, 12, 1...