Math Help Line

United Commercial Bank Post: Probationary Officer

4-Feb-2020

Q:

A scientist have 400 units of a 6% phosphoric acid solution and an unlimited supply of 12% phosphoric acid. How many units of the latter must add to the former to produce a 10% phosphoric acid solution?


United Commercial Bank Post: Probationary Officer-03-01-2020

Answer

800 unit

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Q:

A school store sell one kind of pens and pencils at a uniform price per pen or per pencil of the cost of 3 pens and 6 pencil is twice than 12 pens and 4 pencil. The total cost of 2 pens and 4 pencil is how many time that of one pen?


United Commercial Bank Post: Probationary Officer-03-01-2020

Answer

5 pens

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