alleryপ্ৰথম 10 টা স্বাভাৱিক সংখ্যাৰ গড় হৈছে:
A5.5
B5
C6
D6.5
Answer & Solution
Correct answer: A. 5.5
1. প্ৰথম 10 টা স্বাভাৱিক সংখ্যা হৈছে 1 ৰ পৰা 10 লৈ।
2. সেইবোৰৰ যোগফল হৈছে 10 x 11 / 2 = 55।
3. গড় হৈছে যোগফলক সংখ্যাৰে হৰণ কৰা, অৰ্থাৎ 55 / 10।
4. ইয়াৰ ফলত 5.5 পোৱা যায়।
5. উত্তৰ হিচাপে 5 দিয়াটো অসাবধানভাৱে 1 ৰ পৰা 10 ৰ মাজৰ অংশ লোৱা বুজাব; যুগ্ম সংখ্যাৰ ক্ষেত্ৰত গড় 5 আৰু 6 ৰ মাজত পৰে।
_Source: syllabus Maths, Ch 13 'Statistics', S13.2 Mean of Grouped Data_
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