Quantitative Reasoning is one of the means at which job applicants are tested for the various job openings. So applicants find it so difficult at this stage and there hope of getting the job disappear in there presence. This thread is to help them. We are all going to be a part in helping each other. Question will be posted and answers will be provided. Caution serious minded people are wanted on this thread. Thanks for your cooperation.

alphasino: Quantitative Reasoning is one of the means at which job applicants are tested for the various job openings. So applicants find it so difficult at this stage and there hope of getting the job disappear in there presence. This thread is to help them. We are all going to be a part in helping each other. Question will be posted and answers will be provided. Caution serious minded people are wanted on this thread. Thanks for your cooperation.

Question
Over a three-week period, the price of an ounce of gold increased by 25% in the following week, and decreased by 20% in the second week, 5% in the third week. If the price of gold was G dollars per ounce at the beginning of the three weeks, what was the price, in terms of G, at the end of the three weeks?

Pls explain your answer.

alphasino:

Question
Over a three-week period, the price of an ounce of gold increased by 25% in the following week, and decreased by 20% in the second week, 5% in the third week. If the price of gold was G dollars per ounce at the beginning of the three weeks, what was the price, in terms of G, at the end of the three weeks?

Pls explain your answer.

price @ d end of d 1st week= G + (25% of G) = 5G/4,

price @ d end of d 2nd week = 5G/4 - (20% of 5G/4) = (5G/4 - G/4) = 4G/4 = G,

price @ d end of d 3rd week: question is ambiguous but if it increased by 5%) = G + (5% of G) = G + 5G/100 = 105G/100 = 21G/20

if it decreased by 5%) = G - (5% of G) = G - 5G/100 = 95G/100 = 19G/20...... QED

The 2nd poster is correct but he used a long method to solve it. The shortest means is to multiply G x 1.25 x 0.8 x 0.95. Which is equal to 0.95G which is the same as 19/20G.....QED

correctguy01: The 2nd poster is correct but he used a long method to solve it. The shortest means is to multiply G x 1.25 x 0.8 x 0.95. Which is equal to 0.95G which is the same as 19/20G.....QED

yea bro..i jst wanted it to be detailed nd self-explanatory..tnx

dejt4u:
yea bro..i jst wanted it to be detailed nd self-explanatory..tnx

The price increased by 25%,so it is the same as multiplying it by 1.25,it fell by 20%,so u multiply by 0.80 that is (1-0.20) and fell again by 5%,so u multiply by 0.95 (1.00-0.05)

dejt4u:
price @ d end of d 1st week= G + (25% of G) = 5G/4,

price @ d end of d 2nd week = 5G/4 - (20% of 5G/4) = (5G/4 - G/4) = 4G/4 = G,

price @ d end of d 3rd week: question is ambiguous but if it increased by 5%) = G + (5% of G) = G + 5G/100 = 105G/100 = 21G/20

if it decreased by 5%) = G - (5% of G) = G - 5G/100 = 95G/100 = 19G/20...... QED

Nice job. 21G/20 is correct

alphasino:

Nice job. 21G/20 is correct

19G/20 that is 0.95G is also correct because the question was silent on whether it fell or rose( I mean he third instance) You only said 5% in the 3rd week and nothing more