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Question
The heights (in centimeters) of 40 children are.
| 110 | 112 | 112 | 116 | 119 | 111 | 113 | 115 | 118 | 120 |
| 110 | 113 | 114 | 111 | 114 | 113 | 110 | 120 | 118 | 115 |
| 112 | 110 | 116 | 111 | 115 | 120 | 113 | 111 | 113 | 120 |
| 115 | 111 | 116 | 112 | 110 | 111 | 120 | 111 | 120 | 111 |
Prepare a tally marks table
Solution
| Height (in Cms) | Tally Marks | frequency |
| 110 | |||| | 5 |
| 111 | |||| ||| | 8 |
| 112 | |||| | 4 |
| 113 | |||| | 5 |
| 114 | || | 2 |
| 115 | |||| | 4 |
| 116 | ||| | 3 |
| 117 | − | − |
| 118 | || | 2 |
| 119 | | | 1 |
| 120 | |||| | | 6 |
| Total | 40 |
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Arrange these marks in the ascending order, 30 to 39 one group, 40 to 49 second group etc.
Now answer the following:
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| 8 | 1 | 3 | 7 | 6 | 5 | 5 | 4 | 4 | 2 |
| 4 | 9 | 5 | 3 | 7 | 1 | 6 | 5 | 2 | 7 |
| 7 | 3 | 8 | 4 | 2 | 8 | 9 | 5 | 8 | 6 |
| 7 | 4 | 5 | 6 | 9 | 6 | 4 | 4 | 6 | 6 |
Find how many students obtained marks equal to or more than 7.
