solve this please anybody plzzz solve this
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We know that x is always with same difference
then from above
In x,there is difference of 2 then
Here,after 19 there is 21
And in frequency,
difference of 1
then the value is 1
If mean is 20
then, the answer is in the image
then from above
In x,there is difference of 2 then
Here,after 19 there is 21
And in frequency,
difference of 1
then the value is 1
If mean is 20
then, the answer is in the image
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