Subject
Quantitative Aptitude
Topic
Set
If 75% of a class answered the 1stquestion on a certain test correctly, 55% answered the 2ndquestion on the test correctly and 20% answered neither of the questions correctly, what percent answered both correctly?
If 75% of a class answered the 1stquestion on a certain test correctly, 55% answered the 2ndquestion on the test correctly and 20% answered neither of the questions correctly, what percent answered both correctly?
ক)
10%খ)
20%গ)
30%ঘ)
noneExplanation
প্রশ্নে বলা হচ্ছে, ৭৫% ছাত্র একটি প্রশ্নের সঠিক উত্তর দিল, দ্বিতীয় প্রশ্নে ৫৫% সঠিক উত্তর দিল। ২০% কোনো উত্তরই সঠিকভাবে দিল না। কত শতাংশ ছাত্র সঠিক উত্তর দিল? 1 st প্রশ্নের উত্তর ভুল করে = 100 - 75 = 25% 2 nd প্রশ্নের উত্তর ভুল করে = 100 - 55 = 45% ∴ দুটি প্রশ্নেরই উত্তর ভুল দেয় = 25 + 45 - 20 = 50% ∴ দুটি প্রশ্নেরই Correct উত্তর দেয় = 100 - 50 = 50%Related questions
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