MBA Exam

In a room there were 7 persons. the chance that two of them were born on the same day of the week is - Approach plz !

1) 1080/7^5
2) 2160/7^5
3) 540/7^5
4) NOT

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MBA Other Question

If 10 couples are invited for a party so that either wife alone attends or couple attend the party . How many ways the party can be arranged?

1) 1024
2) 29
3) 19
4) 30
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

1) dont know oa....