IBPS Government Jobs Exams Numerical Ability Alligation or Mixture

P is an alloy of steel and aluminium and Q is an alloy of aluminium and copper. P has 30% aluminium while Q has 50% aluminium. t gms of P is mixed with 30 gms of B to form another alloy which has 45% aluminium. What is the value of t ?
A)15 B)11 C)10 D)13 E)None of these

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IBPS Other Question

Ranjeet bought a book at Rs. 4000. He marked it up by x% above the cost price and then sold it at a discount of 10%. Raghav also bought a book at Rs. 2500 and marked it up by x/2% above cost price and then sold it at a discount of 20%. If the sum of the selling prices of the two books was Rs. 7440, then find the value of ‘x.
A)40 B)50 C)30 D)45 E)35 Rohit borrowed Rs. 950 from Sanjeev at 14% p.a. simple interest for 4 years. He then added some more money to the borrowed sum and lent it to Rajesh for the same period of time at 15% p.a. simple interest. If Rohit gains Rs. 104 in the whole transaction, how much money did he add from his side?
A)Rs. 85 B)Rs. 100 C)Rs. 105 D)Rs. 110 E)None of these