MBA Exam

for integer x and y function f is defined asf(x+y)+f(x-y)-f(x)f(y)=0if f(0)=2 ,f(2)=7 and f(x)>0 ,for x>0 then[f(4)-f(-5)]=

1) -53
2) -22
3) 1
4) not

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MBA Other Question

1 > Number of ways to Distribute 4 Distinct objects into 3 identical boxes?2> Number of ways to wear 4 identical ring in 2 fingers?3> Distribute 4 identical objects to 3 Identical boxes?

1) 16,5,4
2) 16,16,4
3) 10,16,15
4) 10,5,15
An intelligence agency forms a code of two distinct digits selected from 0, 1, 2, ... , 9 such that the first digit of the code is non-zero. The code, handwritten on a slip, can however potentially create confusion, when read upside down for example, the code 91 may appear as 16. How many codes are there for which no such confusion can arise?

1) 80
2) 78
3) 69
4) 71