The class mark of a frequency distribution with equal sizes of two successive classes is $72$ and $77$. Then,the width of the class is ...........
- A$2.5$
- B$5$
- C$74.5$
- D$149$
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The mean of $3, -3, -3, 3, 3, -3$ is ..........
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Class $0-10$ $10-20$ $20-30$ $30-40$ $40-50$ $50-60$ Frequency $5$ $7$ $12$ $9$ $13$ $5$
| Class | $0-10$ | $10-20$ | $20-30$ | $30-40$ | $40-50$ | $50-60$ |
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View SolutionExpenditure on education of a country during a five-year period $(2002-2006)$,in crores of rupees,is given below:
Elementary education $240$ Secondary education $120$ University education $190$ Teacher's training $20$ Social education $10$ Other educational programmes $115$ Cultural programmes $25$ Technical education $125$
Represent the information above by a bar graph.
| Elementary education | $240$ |
| Secondary education | $120$ |
| University education | $190$ |
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| Cultural programmes | $25$ |
| Technical education | $125$ |
Represent the information above by a bar graph.
The median of the following observations arranged in ascending order is $53 :$ $41, 48, x+1, x+5, 62, 72$. Find $x$.
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