Math, asked by sharad60361, 9 months ago

The following table gives the marks scored by 50 students in a class-test:
Find the mean marks scored by a student in the class-test.

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Answers

Answered by Alcaa
0

Mean marks scored by a student in the class-test is 304.

Step-by-step explanation:

We are the following table which gives the marks scored by 50 students in a class-test below;

 

     Marks              No. of students (f)             X               X \times f

     0 - 100                         2                             50               100

   100 - 200                      8                             150             1200

   200 - 300                     12                            250            3000

   300 - 400                     20                           350             7000

   400 - 500                      5                            450             2250

   500 - 600                      3                           550            1650          

     Total                          50                                             15200          

Now, the mean of the frequency distribution is given by the following formula;

                      Mean,  \bar X  =  \frac{\sum X \times f}{\sum f}

                                       =   \frac{15200}{50}

                                       =  304

Hence, the mean marks scored by a student in the class-test is 304.

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