This long sentence "Since it is made of chemicals any food is wrapped up in it particularly in the black polythene bag for a long time, the food item becomes contaminated” refers to

This long sentence "Since it is made of chemicals any food is wrapped up in it particularly in the black polythene bag for a long time, the food item becomes contaminated” refers to Correct Answer

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একটি থলেতে 4 টি সাদা এবং 2 টি কালো বল আছে। অপর একটি থলেতে 3 টি সাদা ও 5 টি কালো বল আছে। যদি প্রত্যেক থলে হতে একটি করে বল উত্তোলন করা হয়, তবে বলদ্বয় সাদা হওয়ার সম্ভাবনা কত? (A bag contains 4 white and 2 black balls. Another bag contains 3 white and 5 black balls. If one ball is drawn from each bag, what is the probability that both balls are white?)
In a city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes. What percentage of the people in the city has neither black hair nor black eyes?
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The sumof the pre-tax costs of items A ans item B is Tk. 300. In dhaka, each item would be charged a flat 7% tax. In Rangpur item A is subject to 5% tax and item b is subject to 10% tax. If the tax in Rangpur on the purchase of both items is exactly Tk 3 more than it is in Dhaka, than what is the pre - tax price of item A?
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Low density polythene as compared to high density polythene is
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