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A = {2, 3, 4, 5} B = {4, 5, 6, 7, 8} Two integers will be r
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09 Sep 2020, 10:35
09 Sep 2020, 10:35
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A = {2, 3, 4, 5}
B = {4, 5, 6, 7, 8}
Two integers will be randomly selected from the sets above, one integer from set A and one integer from set B. What is the probability that the sum of the two integers will equal 9?
(A) 0.15
(B) 0.20
(C) 0.25
(D) 0.30
(E) 0.33
B = {4, 5, 6, 7, 8}
Two integers will be randomly selected from the sets above, one integer from set A and one integer from set B. What is the probability that the sum of the two integers will equal 9?
(A) 0.15
(B) 0.20
(C) 0.25
(D) 0.30
(E) 0.33
Re: A = {2, 3, 4, 5} B = {4, 5, 6, 7, 8} Two integers will be r
[#permalink]
09 Sep 2020, 10:35
09 Sep 2020, 10:35
Expert Reply
Post A Detailed Correct Solution For The Above Questions And Get A Kudos.
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
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Re: A = {2, 3, 4, 5} B = {4, 5, 6, 7, 8} Two integers will be r
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09 Sep 2020, 11:52
09 Sep 2020, 11:52
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Carcass wrote:
A = {2, 3, 4, 5}
B = {4, 5, 6, 7, 8}
Two integers will be randomly selected from the sets above, one integer from set A and one integer from set B. What is the probability that the sum of the two integers will equal 9?
(A) 0.15
(B) 0.20
(C) 0.25
(D) 0.30
(E) 0.33
B = {4, 5, 6, 7, 8}
Two integers will be randomly selected from the sets above, one integer from set A and one integer from set B. What is the probability that the sum of the two integers will equal 9?
(A) 0.15
(B) 0.20
(C) 0.25
(D) 0.30
(E) 0.33
Here's a quick solution.
First randomly select a number from set A. [I suggest that you actually do this at home]
At this point, you can see that, among the 5 numbers in set B, only 1 of them will combine with your number from set A to create a sum of 9.
So, the probability of getting a sum of 9 = 1/5 = 0.2
Answer: B
Cheers,
Brent
