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what is the probability that an integer selected at random from those between 10 and 100 inclusive is a multiple of 5 or 9?

what is the probability that an integer selected at random from those between 10 and 100 inclusive is a multiple of 5 or 9? Correct Answer 2791

1  -  100 পর্যন্ত  সংখ্যাগুলর মধ্যে 5 দ্বারা বিভাজ্য সংখ্যা 5)100(20                                                                                                 1000⸫ 10  -  100 পর্যন্ত  সংখ্যাগুলর মধ্যে 9 দ্বারা বিভাজ্য সংখ্যা  =  11 - 1 = 10 টিএখন 5 এবং 9 উভয় দ্বারা বিভাজ্য সংখ্যা  =  2 টি (45 এবং 90)⸫ 5 অথবা 9 দ্বারা বিভাজ্য সংখ্যা =  19 + 10 - 2 = 27⸫ সম্ভাব্যতা  =  2791

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