In an animal behavior experiment, 50 tagged white pigeons and 200 tagged gray pigeons were released from a laboratory. Within on

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问题 In an animal 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 pigeons returned to the laboratory?

选项 A、80.5
B、82
C、82.5
D、85
E、86.5

答案B

解析 88% of 50 is 44, and 80.5% of 200 is 161.44+161=205. 205/250 total pigeons=0.82=82%.

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In an animal behavior experiment, 50 tagged white pigeons and 200 tagged gray pigeons were released from a laboratory. Within on

GMAT QUANTITATIVE

GMAT

Thefourth-gradersatChicago’sMcCormickElementarySchooldon’tknowChineseissupposedtobehardtolearn.Formost,who

Onceuponatimeapoorfarmertakingasackofwheattothemilldidnotknowwhattodowhenitslippedfromhishorseandfel

Mancannotgoonincreasinghisnumberatthepresentrate.Inthenext30yearsmanwillfaceaperiodofcrisis.Someexperts

Mancannotgoonincreasinghisnumberatthepresentrate.Inthenext30yearsmanwillfaceaperiodofcrisis.Someexperts

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Theopeningbetweentherockswasverynarrow,buttheboysmanagedto()through.

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