Wipro Company Numerical Ability Alligation or Mixture

Concentrations of three wines A, B and C are 10, 20 and 30 percent respectively. They are mixed in the ratio 2: 3 : x resulting in a 23% concentrated solution. Find x.

a)7
b)6
c)5
d)4

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Wipro Other Question

The ratio between a two - digit number and the sum of the digits of that number is 4 : 1. If the digit in the unit place is 3 more than the digit in the ten's place, what is that number ?

a. 24
b. 63
c. 36
d. None of these
It takes 9 hours by train to travel a certain distance. If on the return trip a train is taken which runs 9 kmph faster than the first and it does it in 3/4th of the time it took the first train, how fast is the first train?

a. 21
b. 27
c. 18
d. 24