In a college, the ratio of foreign to loc… | Answer

Subject

Quantitative Aptitude

Topic

Ratio

In a college, the ratio of foreign to local students is 3 : 7. If three-fourths of the local students are female and one-quarter of the foreign students is female. What fraction of the combined students is female?
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ক)

50%

খ)

60%

গ)

64%

ঘ)

65%

ঙ)

None

Explanation

ধরি, বিদেশী ছাত্র-ছাত্রীর সংখ্যা = 3x স্থানীয় ছাত্র-ছাত্রীর সংখ্যা = 7x স্থানীয় ছাত্র-ছাত্রীর মোট সংখ্যার তিন-চতুর্থাংশ হলো ছাত্রী। স্থানীয় ছাত্রীদের সংখ্যা = 7x * (3/4) = (21/4)x বিদেশী ছাত্র-ছাত্রীর মোট সংখ্যার এক-চতুর্থাংশ হলো ছাত্রী। বিদেশী ছাত্রীদের সংখ্যা = 3x * (1/4) = (3/4)x মোট ছাত্রীদের সংখ্যা = (21/4)x + (3/4)x = (24/4)x = 6x মোট ছাত্র-ছাত্রীর সংখ্যা = 3x + 7x = 10x ছাত্রীদের অনুপাত = (মোট ছাত্রীদের সংখ্যা) / (মোট ছাত্র-ছাত্রীর সংখ্যা) ছাত্রীদের অনুপাত = 6x / 10x = 3/5 ছাত্রীদের শতকরা হার = (3/5) * 100% = 60%

Moyna and Noyna respectively got 20% more and 10% less marks than Jolin in exam. What is the ratio of Noyna and Moyna's exam scores?

In a college, the ratio of foreign to local students is 3 : 7. If three-fourths of the local students are female and one-quarter of the foreign students is female. What fraction of the combined students is female?Reading

In a college, the ratio of foreign to local students is 3 : 7. If three-fourths of the local students are female and one-quarter of the foreign students is female. What fraction of the combined students is female?

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In a college, the ratio of foreign to local students is 3 : 7. If three-fourths of the local students are female and one-quarter of the foreign students is female. What fraction of the combined students is female?
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