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If in an experiment the probabilities of obtaining the values
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27 Jul 2021, 09:41
27 Jul 2021, 09:41
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If in an experiment the probabilities of obtaining the values a1,a2,a3,a4 , and a5 are p1,p2,p3,p4 , and p5 respectively , then the expected value is defined as a1p1+a2p2+a3p3+a4p4+a5p5. For the values and their corresponding probabilities in the table above, what is the expected value?
(A) 350
(B) 320
(C) 300
(D) 270
(E) 250
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Re: If in an experiment the probabilities of obtaining the values
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27 Jul 2021, 20:31
27 Jul 2021, 20:31
1
Carcass wrote:
Attachment:
GRE probability.jpg
If in an experiment the probabilities of obtaining the values a1,a2,a3,a4 , and a5 are p1,p2,p3,p4 , and p5 respectively , then the expected value is defined as a1p1+a2p2+a3p3+a4p4+a5p5. For the values and their corresponding probabilities in the table above, what is the expected value?
(A) 350
(B) 320
(C) 300
(D) 270
(E) 250
a1p1+a2p2+a3p3+a4p4+a5p5
(100)(0.10)+(200)(0.25)+(300)(0.20)+(400)(0.25)+(500)(0.20)
10+50+60+100+100=320
Hence, option B
gmatclubot
Re: If in an experiment the probabilities of obtaining the values [#permalink]
27 Jul 2021, 20:31
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