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  • Give answer! If the frequencies of first four numbers out of 1, 2, 4, 6, 8 are 2, 3, 3 , 2 respectively, then the frequency of 8 if their AM is 5, is

If the frequencies of first four numbers out of 1, 2, 4, 6, 8 are 2, 3, 3 , 2 respectively, then the frequency of 8 if their AM is 5, is

  • Option 1)

    4

  • Option 2)

    5

  • Option 3)

    6

  • Option 4)

    none of these

 

Answers (1)

best_answer

As we learned

 

Discrete frequency distribution -

A representation of data in which each outcome is paired with its frequency is called a frequency distribution.

ex :   x :    0    1    2    3    4    5

         f :     2    4    4    6    4    5

-

 

 Here mean A=5

Let the frequency of 8 be x. Then by the formula

A=\frac{\sum xf}{\sum f}

5=\frac{1.2+2.3+4.3+6.2+8.x}{2+3+3+2+x}= \frac{32+8x}{10+x}

or         18 = 3x;  x = 6.


Option 1)

4

Option 2)

5

Option 3)

6

Option 4)

none of these

Posted by

Himanshu

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