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forsale [732]
2 years ago
10

Question 5

Mathematics
1 answer:
Zanzabum2 years ago
7 0

Answer: it’s the third one

Step-by-step explanation:

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Exams are approaching and Helen is allocating time to studying for exams. She feels that with the appropriate amount of studying
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Answer: 0.05

Step-by-step explanation:

Let M = Event of getting an A in Marketing class.

S = Event of getting an A in Spanish class,

i.e. P(M) = 0.80 , P(S) = 0.60 and P(M∩S)=0.45

Required probability = P(neither M nor S)

= P(M'∩S')

= P(M∪S)'                                 [∵P(A'∩B')=P(A∪B)']

=1- P(M∪S)                               [∵P(A')=1-P(A)]

= 1- (P(M)+P(S)- P(M∩S))   [∵P(A∪B)=P(A)+P(B)-P(A∩B)]

= 1- (0.80+0.60-0.45)

= 1- 0.95

= 0.05

hence, the probability that Helen does not get an A in either class= 0.05

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3 years ago
33 is 50% of what number ?
Vinvika [58]
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Step-by-step explanation:

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