marks scored by 30 students of 10th standard in a unit test of mathematics is given below find the variance of the scores
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Explanation:
Let x=0.
7
ˉ
So, 10x=7.
7
ˉ
x=0.
7
ˉ
On subtracting we get,
9x=7
⟹x=
9
7
=p/q
Where p=7 and q=9
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