A large cube is formed from the material obtained by melting three smaller cubes of 3,4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?

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Job Solution Dutch-Bangla Bank Ltd Dutch-Bangla Bank Ltd - Probationary Officer - 21.12.2012 গণিত
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In a random survey, 25 out of 150 people were able to give a correct answer to the question asked. If 500 people are surveyed , about how many would be expected to answer the question correctly ?

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To reproduce an old photograph, a studio charges Tk. z to make anegative, Tk. 0.6z for each of the first 10 prints, and Tk. 0.2z. for each print in excess of 10 prints. If Tk. 45 is the total charge to make one nagative and 20 prints from an old photograph then what is the value of z?

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The average of a set of 12 numbers, which includes 34, is A. If 34 is removed from the set and 38 is included to the set , what is the average of the new set of numbers in terms of A ?

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