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If the mean of 2, 9, x+6, 2x+3, 5, 10, 5 is 7, then the value of x is :
The following distribution shows the number of runs scored by some batsmen in test matches :
The following table shows the marks scored by 23 students of a class. | Marks | 0 – 10 | 10 – 20 | 20 – 30 | 30 – 40 | 40 – 50 | |-------|--------|---------|---------|---------|----------| | Number of Students | 5 | 3 | 4 | 8 | 3 | The lower limit of the modal class is :
Find 'mean' and 'mode' of the following data :
The mean of the following distribution is
Assertion (A): The arithmetic mean of the following given frequency distribution table is 13.81. Reason (R): Mean = ∑fx / ∑f
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