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OpenStudy (anonymous):
A researcher wants to conduct a genetic study using 12 randomly-selected volunteers. He has a group of 24 volunteers to choose from. 12 are males and 12 are females. What is the probability that the randomly-selected group will be all male OR all female? A. 1/2,704,156 B. 1/1,352,078 C. 1/5,408,312 D. 2,395,008/6,476,475,255
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OpenStudy (anonymous):
@shamil98
OpenStudy (shamil98):
# of ways to succeed:: 12C12 + 12C12 = 2 ---- # of possible groups of 12:: 24C2 = 276 ---- P(all male or all female) = 2/276 = 1/138
OpenStudy (anonymous):
so which answer choice?
OpenStudy (shamil98):
but it isn't one of the choices..
OpenStudy (anonymous):
maybe D?
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OpenStudy (shamil98):
Probably
OpenStudy (shamil98):
The ratios of these answer choices are ridiculous though.
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