Organising Data

Q. In a group of 200 students, 20 played cricket only, 36 played tennis only, 40 played hockey only, eight played cricket and tennis, 20 played cricket and hockey, 28 played hockey and tennis and 80 played hockey. By drawing a Venn diagram, find the number of students who (i) played cricket (ii) played tennis (iii) did not play any of the above three games​ 2

Q.

Given below are the heights of 20 students in centimetres.

Find the number of students whose height is less than or equal to 169 cm

$$\begin{array}{cc}150& 178\\ 153& 156\\ 162& 184\\ 170& 176\\ 186& 173\\ 153& 186\\ 162& 159\\ 180& 183\\ 165& 180\\ 150& 156\end{array}$$

1. 9

2. 10

3. 12

4. 15

Q. how to rearrange data in statistics from ascending to descending order when theres atleast 50 numbers given . I find it very difficult, is there some other way to rearrange the digits?

Q. Gopi spun the spinner 30 times and got the following results: ​$2,1,4,2,4,5,1,4,1,5,3,1,4,2,3,1,5,4,4,2,3,3,5,4,2,2,5,3,1,4$.​ What is the frequency of $4$?​

Q. Two dice are thrown simultaneously. The probability of getting a multiple of 3 on one dice and a prime number on the other is

1. $\frac{2}{3}$
2. $\frac{1}{3}$
3. $\frac{11}{36}$
4. $\frac{1}{2}$

Q.

Given below are the heights of 20 students in centimetres. Find the number of students whose height is less than or equal to 169 cm.

$$\begin{array}{cc}150& 178\\ 153& 156\\ 162& 184\\ 170& 176\\ 186& 173\\ 153& 186\\ 162& 159\\ 180& 183\\ 165& 180\\ 150& 156\end{array}$$

1. 15

2. 9

3. 10

4. 12

Q.

Given below are the heights of 20 students in centimetres. Find the number of students whose height is greater than 169 cm.

$$\begin{array}{cc}150& 178\\ 153& 156\\ 162& 184\\ 170& 176\\ 186& 173\\ 153& 186\\ 162& 159\\ 180& 183\\ 165& 180\\ 150& 156\end{array}$$

Q.

The heights of 50 students, measured to the nearest centimeters, have been found to be as follows:

161 150 154 165 168 161 154 162 150 151

162 164 171 165 158 154 156 172 160 170

153 159 161 170 162 165 166 168 165 164

154 152 153 156 158 162 160 161 173 166

161 159 162 167 168 159 158 153 154 159

(i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160 - 165, 165 - 170, etc.

(ii) What can you conclude bout their heights from the table?

Q. Tenth class students of a school collected amounts for the Earth quake relief fund as follows (Amounts are in Rs.) Draw the Histogram.
$\begin{array}{ccccccccccccccccc}25,& 30,& 45,& 50,& 20,& 30,& 40,& 60,& 50,& 70,& 35,& 75,& 55,& 85,& 65,& 30,& 40,\\ 80,& 45,& 60,& 70,& 45,& 65,& 90,& 80,& 85,& 50,& 35,& 25,& 40,& 70,& 60,& 65,& 25,\\ 70,& 30,& 60,& 80,& 55,& 70,& 60,& 75,& 70,& 45,& 60,& 75,& 30,& 55,& 70,& 45.& \end{array}$