MBA Exam

If b (a – 1) = √3b – 1,

1) 18 + 9√3
2) 20 + 7√3
3) 18 + 10√3
4) 20 + 8√3
5) None of these

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MBA Other Question
(1)2^y+2*(3^y)>3*(4^y) and y=3x^2+2x-2Which of the following is a possible value of x?I don't have the correct option. pls explain the solution.

1) -1.5
2) -2.5
3) -0.5
4) 0.7
5) 1.2
 In how many ways can 8 similar rings be worn on 5 fingers of a hand ?please provide solution

1) 56
2) 495
3) 715
4) 1287