IBPS Government Jobs Exams Numerical Ability Alligation or Mixture

A vessel contains 50 litres of pure milk. From these 10 litres of milk is replaced with water. The process is repeated one more time. Find the quantity of milk (litres) in the final solution.
A)38 B)36 C)32 D)40 E)None of these

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IBPS Other Question

What should come in place of the question mark (?) in the following number series?
18, 26, 53, 117, 242, ?
A)568 B)476 C)356 D)458 E)578 Richa purchased an item for ₹ 6,500 and sold it at a loss of 20%. From that amount she purchased another item and sold it at a profit of 25%. What is her overall gain/loss?
A)Gain of 500 B)Gain of 250 C)Loss of 500 D)Neither gain nor loss E)None of these