MBA Exam

If a,b,c,d are positive integers and a+b+c+d = 99, and A = (-1)a + (-1)b + (-1)c + (-1)d then, the total possible number of values of A are

1) 99
2) 98
3) 3
4) 2

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MBA Other Question

There are 6 straight lines in a plane, no 2 of which are parallel and no 3 of which pass through the same point. If their points of intersection are joined, then the number of additional lines thus introduced is

1) 45
2) 78
3) 105
4) None of these
solution ..... ?

1) a
2) b
3) c
4) d