Mary, who is sixteen years old, is four times as old as her brother , How old will Mary be when she is twice as old as her brother?
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In a certain conservative mutual fund. 70 percent of the money is in vested in bonds , and of that portion , 40 percent is invested in highly rated corporate bonds . If at least $ 1.4 million in this what is the smallest possible total value for the mutual fund?

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Admission জাহাঙ্গীরনগর বিশ্ববিদ্যালয় G ইউনিট উচ্চতর গণিত
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In a annutal behavior experiment , 50 tagged white pigeons and 200 tagged gray pigeons were released from a laboratory. Within one week, 88 percent of the white pigeons and 80.5 percent of the gray pigeons had returned to the laboratory. what percent of the total number of piegens returned to the laboratory?

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