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Q3. If p and q are roots of quadratic eq ax^2 + bx + c = 0 such that unit digit of p and q are same. It is also given that D/a^2 is not divisible by 10. If n is the remainder when (p + q)/2 is divided by 10, then how many values n can take:-
a) 0   b) 1    c) 2  d) 3   e) More than 3

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