MBA Exam

A drinks machine offers three solutions – Tea, Coffee or Random but the machine has been wired up wrongly so that each button does not give what it claims. If each drink costs Rs. 50, what is the mimimum amount of money that must be spent to determine with certainity the correct labeling of the buttons? i do not know the right answer!

1) 50
2) 100
3) 150
4) cnt be determined

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MBA Other Question
The integer solutions (a,b) to a4 + 2(a3) + 2(a2) +2a + 1 = b2 is/are

1) 0
2) 1
3) More than 2 but finite
4) Infinite
 In ΔABC, D is the midpoint of BC. E is a point on AC such that AE :
EC = 2 : 1 and F is a point on AB such that AF : FB = 3 : 1. Line
segments AD and FE intersect at point O. What is the ratio of the area
of ΔDOF to the area of ΔDOE?

1) 3:4
2) 9:8
3) 8:9
4) none