Q7 of 40 Page 154

If the mean of 8,12,21,42, x is 20, find the value of x.





⇒ 100 = x+83


⇒ x = 17


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Draw a histogram for the following frequency distribution.

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Draw a histogram for the following frequency distribution.

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The marks obtained by 12 students in a mathematics examination are given below.

48,78,93,90,66,54,83,58,60,75,89,84.


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Find the mean for the following distribution:

12,14,10,12,15,12,18,10,15,11,19,20,12,15,19,10,18,16,20,17.