MBA Exam

How many pairs (a, b) such that both a and b are non-zero exist if a and b are the roots of x2 + ax + b = 0 ?

1) 1
2) 2
3) 3
4) 4
5) none

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MBA Other Question

Out
of 100 schools in a town, the number of schools having a playground was
30, and all these schools had neither a library nor a laboratory. The
number of schools having a laboratory only was twice the number of those
having a library only. The number of schools having a laboratory as
well as a library was one-fourth the number of those having a laboratory
only. The number of schools having either a laboratory or a library or
both was 35.
How many schools had none of the three, viz. laboratory, library or playground?

1) 20
2) 5
3) 30
4) 35
5) 40
A group of 100 members, comprising the employees of three different organizations A, B and C attends a charity function. Of the members who attend the function, each employee of the organizations A, B and C donates à¤°10, à¤°20 and à¤°30 respectively. The employees of the company A together contribute at least three-fifth of the total donation of the group.
if 23 employees of B were present then how many from A were present?

1) 78
2) 75
3) 73
4) 74