Subject
Bank Exam
Topic
Dutch-Bangla Bank Ltd. - PO (IBA, DU) (15.11.2019) - 2019
What percentage of numbers from 1 to 80 ( inclusive ) has 0 or 5 in the unit's digit ?
What percentage of numbers from 1 to 80 ( inclusive ) has 0 or 5 in the unit's digit ?
ক)
10%খ)
16%গ)
20%ঘ)
21%ঙ)
None of theseExplanation
প্রশ্নে বলা হচ্ছে, শতকরা কতগুলো সংখ্যার একক স্থানীয় অঙ্কে 0 বা 5 আছে ? 1 থেকে 80 পর্যন্ত 5 unitary digit এমন সংখ্যা ( 5, 15, 25, 35, 45, 55, 65, 75 ) অর্থাৎ মোট 8 টি এবং 0 unitary digit এমন সংখ্যা ( 10, 20, 30, 40, 50, 60, 70, 80 ) অর্থাৎ মোট 8 টি ∴ মোট সংখ্যা = 8+8 = 16 টি ∴ percentage = 16×100/80 = 20%Related questions
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