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What are number skills?

Asked by Wyatt Williams, Last updated: Jun 08, 2021

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2 Answers

John Smith

John Smith

John Smith
John Smith

Answered Oct 26, 2016

10 liters
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E. Good

E. Good

E. Good
E. Good

Answered Mar 28, 2019

The correct answer to this question is C,10 liters. This questions has to do with averages.In relation to mathematics, an average is defined as a calculated central value of a set of numbers. This average is based onthe two solutions of sulphuric acid (acid+ water) with concentration of 50% and 80% respectively. Here is the math equation: 0.62 = [.50xn1 + .80 x n2] /[n1 + n2]

–> 0.62 n1 + 0.62 n2 = .5 n1 + .8 n2

–> .12 n1 = .18 n2 –> 2 n1 = 3 n2 –> n1/n2 = 3/2 ………(i)

n3=(n1 + n2) litres of 62 % acid sol. is mixed with 6 lit of water (pure water is used so concentration of it is 0% --it doesnt contain any sulphuric acid at this stage).



.50 = [.62 x n3 + 0 x 6] /[n3 + 6]

.5 n3 + 3 = .62 n3

–> .12 n3 = 3 –> n3 = 300/12 –> n3 = 25 lit.

–> n1 + n2 = 25



putting n1= (3/2).n2 from (i)

(3/2).n2 + n2 = 25

Then we arrive at the answer –> 5/2 . n2 = 25 –> n2 = 10 lit.

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