IBPS Government Jobs Exams Numerical Ability Pipes and Cistern

Two pipes A and B can fill a tank in 60 hours and 40 hours respectively and pipe C can empty the tank in 15 hours. If pipes A and B are opened for 12 hours, then pipe C is also opened. After how many hours, the tank will be emptied?
A)10 hours B)20 hours C)12.5 hours D)15 hours E)None of these

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IBPS Other Question

There are 8 blue, 5 red and 7 yellow balls. What is the probability of choosing either 1 red or yellow ball?
A)2/3 B)3/4 C)4/5 D)3/5 E)1/2 In a 96 litre mixture of water and milk water is only 40%. The milkman sold 12 litres of the mixture to a customer and then added 10 litres of pure milk and 15 litres of water in the mixture. What is the approximate percentage of water in the final mixture?
A)47 B)33 C)45 D)42 E)38