allery10% আৰু 20% ৰ দুটা ক্ৰমিক ৰেহাই এটা একক ৰেহাইৰ সমান, যিটো হ'ল
A25%
B30%
C28%
D26%
Answer & Solution
Correct answer: C. 28%
অৱশিষ্ট ভগ্নাংশ হ'ল 0.9 x 0.8 = 0.72, গতিকে একক ৰেহাই হ'ল 28 শতাংশ।
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