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The mean of six numbers is 21. If one number is excluded, then their mean is 19, the excluded number is ______.
If 7, 2, 9 and 5 occur with frequencies 2, 3, 6 and 4 respectively, then the arithmetic mean is _____.
The mean of 20 observations is 12.5. By error, one observation was noted as –15 instead of 15. Then the correct mean is _____.
Find the value of p , if the mean of the following data is 20.
A bus maintains an average speed of 60 km/hr while going from P to Q and maintains an average speed of 90 km/hr while coming back from Q to P. The average speed of the bus is _____.
Candidates of four school appear in a mathematics test. The data is as follows:
If the average score of the candidates of all the four schools is 66, find the number of candidates that appeared from school III.
Fill in the blanks.
(i) For a given data with 110 observations the ‘less than ogive’ and ‘more than ogive’ intersect at (18, 20). The median of the data is __P__.
(ii) The curve is drawn by taking upper limit of class interval along xaxis and cumulating frequency along yaxis is __Q__ than ogive.
(iii) The mean of 50 number s is 18, the new mean will be __R__ if each observation is increased by 4.
(iv) The mean of seven consecutive natural numbers is 20, then the largest number is __S__ and smallest number of them is __T__.
P, Q, R, S, T
Find the mean, median and mode of the following data.
Mean, Median, Mode
Find the median for the following distribution of workers.
11 videos36 docs201 tests

11 videos36 docs201 tests
