IBPS Government Jobs Exams Numerical Ability Probability

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

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IBPS Other Question

The cost price of the two is same. Difference between their selling price is Rs. 90. On selling one chair, a person got a profit of 12% and on selling another he got a profit of 18%. Find the cost price of each chair.
A)Rs. 1000 B)Rs. 1800 C)Rs. 1200 D)Rs. 2400 E)Rs. 1500 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