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CBSE Class 10 Answered

The mean of the following frequency distribution is 145.Find the missing freguencies x and y.
 
                   CLASS                                         FREQUENCY
                    0-50                                               6
                    50-100                                           X
                   100-150                                          64
                   150-200                                          52
                   200-250                                           Y
                   250- 300                                         14
                   TOTAL                                             200
Asked by Anishma Joseph | 22 Sep, 2014, 08:27: PM
answered-by-expert Expert Answer
Class Frequency xi u subscript i equals fraction numerator x subscript i space minus a over denominator h end fraction space space space space equals space fraction numerator x subscript i space minus space 175 over denominator 50 end fraction fiui
0 - 50 6 25 -3 -18
50 - 100 x 75 -2 -2x
100 - 150 64 125 -1 -64
150 - 200 52 175 0 0
200 - 250 y 225 1 y
250 - 300 14 275 2 28
  sum for blank offi = 200     Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.= -54 - 2x + y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  

Let the assumed mean a = 175, h = 50

 

Also sum for blank offi = 200 = 136 + x + y

54 = x + y .....(1)

Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Answered by Mili Hariyani | 23 Sep, 2014, 04:05: PM

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