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There are total 20 ways to sum.gmatpup 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
Answer is B
Can someone please tell me how to approach questions such as this? Thanks so much!!
Anurag@Gurome wrote:No. of ways of selecting one number from set A = 4C1 = 4gmatpup 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
Answer is B
Can someone please tell me how to approach questions such as this? Thanks so much!!
No. of ways of selecting one number from set B = 5C1 = 5
Total Ways = 4 * 5 = 20
There are 4 ways in which the sum is 9
1) 2(from A) + 7(from B) = 9
2) 3(from A) + 6(from B) = 9
3) 4(from A) + 5(from B) = 9
4) 5(from A) + 4(from B) = 9
Therefore, required probabiity = 4/20 = 0.2
IMO: B
Total events = 4 * 5= 20gmatpup 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
Answer is B
Can someone please tell me how to approach questions such as this? Thanks so much!!
Let's first determine the total number of outcomes. We have 4 numbers in set A, and 5 in set B, and since we are selecting 1 number from each set, the total number of outcomes is 4 x 5 = 20.gmatpup 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
