alleryଏକ ଦ୍ରବ୍ୟ 20% କ୍ଷତିରେ 15,000 ରେ ବିକ୍ରି ହୁଏ। ଏହାର କ୍ରୟ ମୂଲ୍ୟ କେତେ ଥିଲା:
A12,000
B17,250
C18,750
D18,000
Answer & Solution
Correct answer: C. 18,750
1. 20 ପ୍ରତିଶତ କ୍ଷତିର ଅର୍ଥ ହେଉଛି ବିକ୍ରୟ ମୂଲ୍ୟ କ୍ରୟ ମୂଲ୍ୟର 80 ପ୍ରତିଶତ ଅଟେ।
2. ତେଣୁ କ୍ରୟ ମୂଲ୍ୟର 80 ପ୍ରତିଶତ = 15000।
3. ଏକ ପ୍ରତିଶତ ହେଉଛି 15000 / 80 = 187.5।
4. କ୍ରୟ ମୂଲ୍ୟ ହେଉଛି 100 x 187.5 = 18750।
5. 15000 ରେ 20 ପ୍ରତିଶତ ଯୋଗ କଲେ 18000 ମିଳିବ, ଯାହା ଭୁଲ କାରଣ କ୍ଷତି କ୍ରୟ ମୂଲ୍ୟ ଉପରେ ମପାଯାଇଥିଲା, ବିକ୍ରୟ ମୂଲ୍ୟ ଉପରେ ନୁହେଁ।
_Source: syllabus Maths, Ch 7 'Comparing Quantities', S7.1 Recalling Ratios and Percentages_
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