allery48 ছাত্ৰৰ ক্ষেত্ৰত ল'ৰাৰ গড়ে 64, ছোৱালীৰ 76, সকলোৰে 69 নম্বৰ। ছোৱালীৰ সংখ্যা?
A28
B18
C16
D20
Answer & Solution
Correct answer: D. 20
যদি g ছোৱালীৰ সংখ্যা হয় তেন্তে 64(48 − g) + 76g = 69 × 48 g = 20 পোৱা যায়।
Keep practising Averages and Data Interpretation
Browse all Averages and Data Interpretation questions for RPF Constable, or explore more Arithmetic topics.
Related questions
Data: combine and interpretRead the displayCompare chart quantitiesMatch the arithmetic resultMatch the arithmetic resultOutput line: days 1,2,3 give 40,60,50; four-day mean 55. Day 3 to 4 rise?Stacked bars P,Q: 6,8 cm; 1 cm=15 items. Red counts: 30,45. Total non-red?Ten scores average 40; remove two averaging 25, add three averaging 50. New mean?