MBA Exam

If are in arithmetic progression, then which of the following are in arithmetic progression.

1) a, b, c
2) a + b, a + c, c + b
3) 1/a, 1/b ,1/c
4) 1/a+b, 1/a+c, 1/c+b

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MBA Other Question

There are two people P and Q at the the opposite ends A and B. They both started running toward each other. The speed of P is 50 km/hr. After meeting P and Q take 20 and 45 mins respectively to reach at the end. At what time from starting the will they meet for the 10th time??Plz explain your approach also....Dont know the OA

The number of positive integer valued pairs(x,y) satisfying 4x-17y=1 and x<1000 is

1) 59
2) 57
3) 55
4) 58