allery10% এবং 20%-এর পরপর দুটি ছাড় একটি একক ছাড়ের সমান, যা হলো
A25%
B30%
C28%
D26%
Answer & Solution
Correct answer: C. 28%
অবশিষ্ট ভগ্নাংশ হলো 0.9 x 0.8 = 0.72, তাই একক ছাড় হলো 28 শতাংশ।
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