(D) 7 + 4 3
The mean of the values 1, 2, 3, .......n with respective frequencies x, 2x, 3x....
2n+1
(A)
(B)
2
n+1
nx is:
6
n
(C)
2n + 1
2
3
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that the perpendiculars drawn from the vertices of the base of an isosceles triangle to the opposite sides are equal. Answer: Given:
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