MBA Exam

A milkman purchased 9 cows when he had twice as many cows as he had at the beginning. With the addition of the newly purchased cows the number was found to be more than three times the original number of cows. What is the highest possible number of cows which he had at the beginning?

1) 4
2) 7
3) 9
4) None of these

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MBA Other Question

The following is known about three real numbers, x, y and Z.-4 <= x <= 4, -8<= y <= 2, and -8<=z<=2. Then the range of values that M= xz/y can take is best represented by(Please post the Explanation as well)

1) - infinite < x< infinite
2) -16 <= x <=8
3) -8 <= x <=8
4) -16 <= x <=16
f(1)=3600&f;(1)+f(2)+.................f(n)=n^2f(n) than what is d value of f(9)

1) 80
2) 90
3) 100
4) 95