IBPS Government Jobs Exams Numerical Ability Alligation or Mixture

The ratio of milk and water in 55 kg of adulterated milk is 7 : 4 .How much water should be added to the mixture to make the ratio 7 : 6 ?
A)15 kg B)7 1/2 kg C)5 kg D)10 kg E)None of these

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IBPS Other Question

There were 30 boarders in a hostel.10 New men joined. The total expenses increased by Rs 60 but the average per head decreased by Re 1. What was the initial monthly expenditure of hostel ?
A)Rs 3600 B)Rs 3000 C)Rs 300 D)None of these 4 men earn as much as 6 women, 3 women earn as much as 4 boys and 5 boys can earn as much as 7 girls. What is the daily wage of a man if that of a girl is Rs 125 ?
A)Rs 266 B)Rs 490 C)Rs 350 D)Rs 300 E)None of these