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# During the first 3 weeks of a 10-week diet program

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Senior Manager
Joined: 10 Jul 2013
Posts: 314
During the first 3 weeks of a 10-week diet program  [#permalink]

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Updated on: 15 Aug 2013, 12:07
1
00:00

Difficulty:

55% (hard)

Question Stats:

66% (02:14) correct 34% (02:18) wrong based on 93 sessions

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During the first 3 weeks of a 10-week diet program, Bob lost an average of 5 pounds per week. During the final 7 weeks of the program, he lost an average of 2 pounds per week. If he lost the same amount of weight during the first 3 weeks of the program as during the last 3 weeks of the program, how much weight had Bob lost after the seventh week of the diet program ?
(A) 15
(B)12
(C)14
(D)16
(E)13

His total loss during 1st 3 weeks 15 pounds. This is also the amount of weight he lost during the last three weeks. Thus, his total weight loss during all but the fourth through seventh weeks was 30 pounds.
Given that he lost 29 pounds altogether during the 10 weeks [(3*5)+(7*2)], he must have gained 1 pound during the fourth through seventh week. Accordingly, he had lost 14 pounds (-15+1) after the first seven weeks. so the Answer is (C) .

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Asif vai.....

Originally posted by Asifpirlo on 15 Aug 2013, 08:49.
Last edited by Asifpirlo on 15 Aug 2013, 12:07, edited 2 times in total.
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Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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15 Aug 2013, 08:55
Asifpirlo wrote:
During the first 3 weeks of a 10-week diet program, Bob lost an average of 5 pounds per week. During the final 7 weeks of the program, he lost an average of 2 pounds per week. If he lost the same amount of weight during the first 3 weeks of the program as during the last 3 weeks of the program, how much weight had Bob lost after the seventh week of the diet program ?
(A) 15
(B)12
(C)14
(D)16
(E)13

need opinions. will publish my solution soon

in first 3 weeks lost = $$5+5+5 =15$$
in last 7 weeks lost = $$2+2+2+2+2+2+2 = 14$$
in last 3 weeks lost = same as first 3 weeks = $$15$$

therefore lost in FIRST 7 weeks = lost in first 3 + lost in last 7 - lost in last 3 = $$15 + 14 - 15 =14$$
hence C
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Joined: 10 Jul 2013
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Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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15 Aug 2013, 09:00
blueseas wrote:
Asifpirlo wrote:
During the first 3 weeks of a 10-week diet program, Bob lost an average of 5 pounds per week. During the final 7 weeks of the program, he lost an average of 2 pounds per week. If he lost the same amount of weight during the first 3 weeks of the program as during the last 3 weeks of the program, how much weight had Bob lost after the seventh week of the diet program ?
(A) 15
(B)12
(C)14
(D)16
(E)13

need opinions. will publish my solution soon

in first 3 weeks lost = $$5+5+5 =15$$
in last 7 weeks lost = $$2+2+2+2+2+2+2 = 14$$
in last 3 weeks lost = same as first 3 weeks = $$15$$

therefore lost in FIRST 7 weeks = lost in first 3 + lost in last 7 - lost in last 3 = $$15 + 14 - 15 =14$$
hence C

but the question is " how much weight had Bob lost after the seventh week " not lost in 1st 7 weeks
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Asif vai.....

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Joined: 10 Jul 2013
Posts: 314
Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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Updated on: 15 Aug 2013, 12:07
Asifpirlo wrote:
During the first 3 weeks of a 10-week diet program, Bob lost an average of 5 pounds per week. During the final 7 weeks of the program, he lost an average of 2 pounds per week. If he lost the same amount of weight during the first 3 weeks of the program as during the last 3 weeks of the program, how much weight had Bob lost after the seventh week of the diet program ?
(A) 15
(B)12
(C)14
(D)16
(E)13

His total loss during 1st 3 weeks 15 pounds. This is also the amount of weight he lost during the last three weeks. Thus, his total weight loss during all but the fourth through seventh weeks was 30 pounds.
Given that he lost 29 pounds altogether during the 10 weeks [(3*5)+(7*2)], he must have gained 1 pound during the fourth through seventh week. Accordingly, he had lost 14 pounds (-15+1) after the first seven weeks. so the Answer is (C) .

His total loss during 1st 3 weeks 15 pounds. This is also the amount of weight he lost during the last three weeks. Thus, his total weight loss during all but the fourth through seventh weeks was 30 pounds.
Given that he lost 29 pounds altogether during the 10 weeks [(3*5)+(7*2)], he must have gained 1 pound during the fourth through seventh week. Accordingly, he had lost 14 pounds (-15+1) after the first seven weeks. so the Answer is (C) .
_________________

Asif vai.....

Originally posted by Asifpirlo on 15 Aug 2013, 09:50.
Last edited by Asifpirlo on 15 Aug 2013, 12:07, edited 1 time in total.
Director
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Location: India
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Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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15 Aug 2013, 09:58
Asifpirlo wrote:
Asifpirlo wrote:
During the first 3 weeks of a 10-week diet program, Bob lost an average of 5 pounds per week. During the final 7 weeks of the program, he lost an average of 2 pounds per week. If he lost the same amount of weight during the first 3 weeks of the program as during the last 3 weeks of the program, how much weight had Bob lost after the seventh week of the diet program ?
(A) 15
(B)12
(C)14
(D)16
(E)13

His total loss during 1st 3 weeks 15 pounds. This is also the amount of weight he lost during the last three weeks. Thus, his total weight loss during all but the fourth through seventh weeks was 30 pounds.
Given that he lost 29 pounds altogether during the 10 weeks [(3*5)+(7*2)], he must have gained 1 pound during the fourth through seventh week. Accordingly, he had lost 14 pounds (-15+1) after the first seven weeks. so the Answer is (B) .

His total loss during 1st 3 weeks 15 pounds. This is also the amount of weight he lost during the last three weeks. Thus, his total weight loss during all but the fourth through seventh weeks was 30 pounds.
Given that he lost 29 pounds altogether during the 10 weeks [(3*5)+(7*2)], he must have gained 1 pound during the fourth through seventh week. Accordingly, he had lost 14 pounds (-15+1) after the first seven weeks. so the Answer is (B) .

its the same thing what i meant..
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Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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15 Aug 2013, 10:21
Answer is B? It should be C

Asif whats the source of these questions?
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Joined: 10 Jul 2013
Posts: 314
Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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15 Aug 2013, 12:05
Transcendentalist wrote:
Answer is B? It should be C

Asif whats the source of these questions?

where did you find answer is B....!!

obviously answer is (C).. i mentioned it.

hmmmm. typing error. but was correct in the option menu..

Source is Arco math book.
www.arcotestprep.com
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Asif vai.....

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Joined: 06 Sep 2013
Posts: 1745
Concentration: Finance
Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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12 Mar 2014, 13:09
Actually the question is not clear. It should say how much weight did the fatty lose by the end of week 7 or something along those lines

Not GMAT quality questions

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Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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12 Mar 2014, 19:46

First 3 weeks, weight lost = 15 pounds

Next 4 weeks, he gained weight = 1 pound

SO total weight lost after 7 weeks = 15-1 = 14
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Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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17 Aug 2014, 10:15
1
Asifpirlo wrote:
blueseas wrote:
Asifpirlo wrote:
During the first 3 weeks of a 10-week diet program, Bob lost an average of 5 pounds per week. During the final 7 weeks of the program, he lost an average of 2 pounds per week. If he lost the same amount of weight during the first 3 weeks of the program as during the last 3 weeks of the program, how much weight had Bob lost after the seventh week of the diet program ?
(A) 15
(B)12
(C)14
(D)16
(E)13

need opinions. will publish my solution soon

in first 3 weeks lost = $$5+5+5 =15$$
in last 7 weeks lost = $$2+2+2+2+2+2+2 = 14$$
in last 3 weeks lost = same as first 3 weeks = $$15$$

therefore lost in FIRST 7 weeks = lost in first 3 + lost in last 7 - lost in last 3 = $$15 + 14 - 15 =14$$
hence C

but the question is " how much weight had Bob lost after the seventh week " not lost in 1st 7 weeks

I think the question asks that how much of weight is lost from the start of the diet program to end of the seventh week. It the question were asking about the wight lost in the last 3 weeks, then the question would have been "how much of weight is lost after the 7th week till the end of the program? / how much of weight is lost between the 8th week and the end of the program ".
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Re: During the first 3 weeks of a 10-week diet program  [#permalink]

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22 Oct 2018, 04:12
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Re: During the first 3 weeks of a 10-week diet program &nbs [#permalink] 22 Oct 2018, 04:12
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