MBA Exam

A tank has 2 pipes A and B, which can fill the tank in 4 hrs and 6 hrs respectively. Another pipe C can empty the tank in 4 hrs. A man wanted to set a timer which would open the pipe C after the tank would be half filled, but by mistake set it to open when the tank was one -fourth empty. The man was supposed to reach the same place at the same time as the tank filled. How late was the man to reach the spot?

1) 24 min
2) 36 min
3) 48 min
4) 54 min

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MBA Other Question
The number of seven digit integers, with sum of the digits equal to 10 and formed byusing the digits 1, 2 and 3 only, is

1) 55
2) 66
3) 77
4) 88
 The average score of 60 students is 90. If scores of top 5 students is not considered then average of the remaining drops by 5.If the second ranked student scored less than 140 and all the students got integral scores , Find the minimum mark scored by topper?

1) 175
2) 169
3) 153
4) 161