Yahoo Answers: Answers and Comments for Simple probability function [數學]
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Fri, 22 Feb 2013 21:22:06 +0000
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Yahoo Answers: Answers and Comments for Simple probability function [數學]
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From myisland8132: 1(a) X can only be 2,3 or 4
Shape no. of ...
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https://hk.answers.yahoo.com/question/index?qid=20130222000051KK00280
Fri, 22 Feb 2013 22:08:41 +0000
1(a) X can only be 2,3 or 4
Shape no. of X
2 squares 3
3 squares 2
4 squares 1
Then P(2) = 3/6, P(3) = 2/6, P(4) = 1/6
2(a) To form a square, we should choose 1,4,9 small squares
So, the possible values of X are 8,5,0
X no. of X
8 9 (As you can take any one square to colour)
5 2 * 2 = 4
0 1 (Take all squares to colour)
No. of all possible outcomes = 14
(b) P(X = 0) = 1/14, P(X = 5) = 4/14, P(X = 8) = 9/14