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Q. The number of students in a seminar is 210.If the boys are increased by 20% and the girls by 32%, the number of students will be 273.Find the number of girls initially.

Q. एक सेमिनार में छात्रों की संख्या 210 है। यदि लड़कों की संख्या 20% और लड़कियों की संख्या 32% बढ़ जाए, तो छात्रों की संख्या 273 हो जाएगी। लड़कियों की प्रारंभिक संख्या ज्ञात कीजिए।


A
175
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B
180
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C
150
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D
120
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Solution

The correct option is A 175

Average % of increase

=273210210×100=30%


Boy : Girl =2:10=1:5

The number of girls =210×55+1=175

वृद्धि का औसत %=273210210×100=30%


लड़का: लड़की =2:10=1:5

लड़कियों की संख्या =210×55+1=175


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