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If m pencils cost the same as n pens, and each pencil costs 20 cents,
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26 Sep 2017, 16:50
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If m pencils cost the same as n pens, and each pencil costs 20 cents, what is the cost, in dollars, of 10 pens, if each pen costs the same amount? (100 cents = 1 dollar) A. 200n/m B. 2n/100m C. 2m/n D. 2n/m E. 200nm
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Re: If m pencils cost the same as n pens, and each pencil costs 20 cents,
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26 Sep 2017, 18:27
equality 20*m=n*x (x price of pens) multiply the equality by 10 10*20*m=10*n*x 200m=10nx 10x=200m/n or in dollars 2m/n



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Re: If m pencils cost the same as n pens, and each pencil costs 20 cents,
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26 Sep 2017, 19:15
Let cost of each pen= y No of pens= n Total cost of pen= ny Cost of each pencil= 20 cents No of pencils= m Total cost of pencil= 20m Total cost of m pencils= Total cost of n pens 20m=ny Multiply both sides by 10 200m= 10ny 10y =\(\frac{200m}{n}\) 10y= \(\frac{2m}{n}\) (100cents= 1 dollar) cost of 10 pencils= 10y Answer:C.Kudos please if you like my explanation!
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Re: If m pencils cost the same as n pens, and each pencil costs 20 cents,
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26 Sep 2017, 20:23
Gnpth wrote: If m pencils cost the same as n pens, and each pencil costs 20 cents, what is the cost, in dollars, of 10 pens, if each pen costs the same amount? (100 cents = 1 dollar)
A. 200n/m
B. 2n/100m
C. 2m/n
D. 2n/m
E. 200nm Given: \(n\) pens \(= m\) pencils => \(1\) pen \(= \frac{m}{n}\) pencils therefore \(10\) pens \(= \frac{10m}{n}\) pencils Given cost of \(1\) pencil = \(20\) cents therefore cost of \(m\) pencils \(= 20m\) cents hence cost of \(10\) pens in \($ = \frac{(10*20m)}{n}*\frac{1}{100} = \frac{2m}{n}\) Option C



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If m pencils cost the same as n pens, and each pencil costs 20 cents,
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26 Sep 2017, 21:14
The cost of m pencils is the same as the cost of n pens. Assume m = 5 and n = 4 Let x be the cost of a pen. Given data: Cost of a pencil  20 cents 20m = nx 20*5 = 4*x => x = 5*5 = 25 cents Therefore, if each pencil costs 20 cents, the pens cost 25 cents. We have been asked to find the cost of 10 pens in dollars, the cost of 10 pens will be 250 cents or 2.5$ Putting the values of m and n in the answer options, we will be able to arrive at the solution A. \(\frac{200n}{m} = \frac{200*4}{5} = 250\)$(wrong) B. \(\frac{2n}{100m} = \frac{2 * 5}{100 * 4} = \frac{1}{40} = 0.25\)$(wrong) C. \(\frac{2m}{n} = \frac{2*5}{4} = 2*1.25 = 2.5\)$(correct) Hence, Option C is the correct answer option.
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If m pencils cost the same as n pens, and each pencil costs 20 cents,
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19 Aug 2018, 09:42
Bunuel wrote: If m pencils cost the same as n pens, and each pencil costs 20 cents, what is the cost, in dollars, of 10 pens, if each pen costs the same amount? (100 cents = 1 dollar)
(A) \(\frac{200n}{m}\)
(B) \(\frac{2n}{100m}\)
(C) \(\frac{2m}{n}\)
(D) \(\frac{2n}{m}\)
(E) \(200mn\) Given the unit cost of pencil=20 cents=$0.2. Let the unit cost of pen $x. Given, m pencils cost the same as n pens. So, 0.2*m=n*x Or, x=\(\frac{0.2m}{n}\) Ans. (C) So, cost of 10 pens=unit cost of pen * no of pens=x*10=\(\frac{0.2m}{n}*10\)=\(\frac{2m}{n}\)
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Re: If m pencils cost the same as n pens, and each pencil costs 20 cents,
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24 Oct 2018, 05:33
varun4s wrote: Let cost of each pen= y No of pens= n Total cost of pen= ny
Cost of each pencil= 20 cents No of pencils= m Total cost of pencil= 20m
Total cost of m pencils= Total cost of n pens 20m=ny Multiply both sides by 10 200m= 10ny 10y =\(\frac{200m}{n}\) 10y= \(\frac{2m}{n}\) (100cents= 1 dollar) cost of 10 pencils= 10y
Answer:C.
Kudos please if you like my explanation! Why both sides are multiplied by 10??



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Re: If m pencils cost the same as n pens, and each pencil costs 20 cents,
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24 Oct 2018, 06:37
=> 11 pen
therefore 1010 pens
Given cost of 11 pencil
therefore cost of mm pencils =20m=20m cents
Option C



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Re: If m pencils cost the same as n pens, and each pencil costs 20 cents,
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25 Oct 2018, 16:55
Gnpth wrote: If m pencils cost the same as n pens, and each pencil costs 20 cents, what is the cost, in dollars, of 10 pens, if each pen costs the same amount? (100 cents = 1 dollar)
A. 200n/m
B. 2n/100m
C. 2m/n
D. 2n/m
E. 200nm We can let p = the cost of a pen, in cents and we can create the equation: 20m = pn 20m/n = p So the cost of each pen, in dollars, is (20m/n)/100 = 20m/100n = m/5n. So 10 pens cost: 10 x m/5n = 2m/n dollars. Alternate Solution: We are told that m pencils cost the same as n pens, and pencils cost 20 cents (0.20 dollars) each, so we have: 0.20m = n We see that n pens cost 0.20m, so the cost of one pen can be obtained by dividing by n, so we get: 0.20m/n = n/n 0.20m/n = 1 Since 1 pen costs 0.20m/n dollars, then 10 pens costs (0.20m/n) x 10 = 2m/n dollars. Answer: C
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Re: If m pencils cost the same as n pens, and each pencil costs 20 cents,
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28 Oct 2018, 04:36
Gnpth wrote: If m pencils cost the same as n pens, and each pencil costs 20 cents, what is the cost, in dollars, of 10 pens, if each pen costs the same amount? (100 cents = 1 dollar)
A. 200n/m
B. 2n/100m
C. 2m/n
D. 2n/m
E. 200nm pencil costs20 cents we have m pencils, so m pencil total cost=20m cents 20 m cost=n x  where n is no of pens so 1 pen cost20m/n cents 10pen cost200m/n cents 1 dollar=100 cents so 10 pen cost200m/n * 1/100=20m/n correct OA:C
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Re: If m pencils cost the same as n pens, and each pencil costs 20 cents, &nbs
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