If a +2b= 6 , ab =4 what is 2/a + 1/b ?

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Job Solution Pubali Bank Ltd Pubali Bank Ltd - Senior Officer 31.05.2013 গণিত
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If a and b are integers greater than 100 such that a+b =300 , which of the following could be the exact ratio of a to b?

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At the beginning of a class period, half of the students in a class go to the library. Later in the period, half of the remaining students go to the computer lab. If there are 5 students remaining in the class, how many students were originally in the class?

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