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genyjoannerubiera
03.03.2020 •
Mathematics
3.3.1. An urn contains five balls numbered 1 to 5. Two balls are drawn simultaneously. (a) Let X be the larger of the two numbers drawn. Find pX (k). (b) Let V be the sum of the two numbers drawn. Find pV (k).
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Ответ:
Step-by-step explanation:
Given that an urn contains five balls numbered 1 to 5
Two balls are drawn simultaneously.
a) X = the larger of two numbers drawn
Assuming balls are drawn without replacement, (since simultaneously drawn)
the sample space would be (1,2) (1,3)(1,4)(1,5) (2,3)(2,4)(2,5) (3,4) (3,5) (4,5)
n(S) = 10
n(x=2) = 1,
n(x=3) =2
n(x=4) = 3
n(x=5) = 4
Larger value X can take values only as 2,3,4 or 5
X 2 3 4 5
p 0.1 0.2 0.3 0.4
b) V = sum of numbers drawn
V can take values as 3, 4, 5, 6, 7, 8 or 9
V 3 4 5 6 7 8 9
p 0.1 0.1 0.2 0.2 0.2 0.1 0.1
Ответ: