Calculate the value of n from the below equation: n^3âˆ’10n+20=44
Options:
(A) 1
(B) 5
(C) 3
(D) 2
(E) 4
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Use elimination method to find the correct option. you find that of all the options when 4 is the correct value for n So the answer is: (E).
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The sale price sarees listed for Rs.400 after successive discount is 15% and 5% is?
Options:
(A) 338
(B) 323
(C) 342
(D) 882
(E) 212
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400*(85/100)*(95/100) = 323 So the answer is: (B).
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From a Group of 10 People, Including George and Nina, 3 people are to be selected at random to work on a certain project. What is the probability that 3 people selected will include George but not Nina
Options:
(A) 5/56
(B) 9/56
(C) 28/120
(D) 21/56
(E) 25/56
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Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Number of ways of selecting 3 people out of 10 people = 10C3
In the three members George will always be there in the team. At this step we have vacancy for 2 more members and 9 members are available. Lina cannot be there in the team. So 2 members have to be selected and the number of available members = 9 - Nina = 8
Number of ways to form a 3 member team that includes George and excludes Nina = 8C2
Probability = 8C2/10C3 = 28/120 So the answer is: (C).
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