two numbers are selected at random from the integers 1 through 9 what is the probability that one of the numbers is 2 if the sum is odd
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numbers from 1 to 9
P(E)=?
event = one of the numbers is 2 if 2 no selected random 1 to 9
sample space = { (1,2)(1,4)(1,6)(1,8)(2,1)(2,3)(2,5)(2,7)(2,9)(3,2)(3,4)(3,6)(3,8)(4,1)(4,3)(4,5)(4,7)(4,9)(5,2)(5,4)(5,6)(5,8)(6,1)(6,3)(6,5)(6,7)(6,9)(7,2)(7,4)(7,6)(7,8)(8,1)(8,3)(8,5)(8,7)(8,9)(9,2)(9,4)(9,6)(9,8) }
total =40
no containing 2 =10
P(E)=10/40=1/4
=0.25 ans
P(E)=?
event = one of the numbers is 2 if 2 no selected random 1 to 9
sample space = { (1,2)(1,4)(1,6)(1,8)(2,1)(2,3)(2,5)(2,7)(2,9)(3,2)(3,4)(3,6)(3,8)(4,1)(4,3)(4,5)(4,7)(4,9)(5,2)(5,4)(5,6)(5,8)(6,1)(6,3)(6,5)(6,7)(6,9)(7,2)(7,4)(7,6)(7,8)(8,1)(8,3)(8,5)(8,7)(8,9)(9,2)(9,4)(9,6)(9,8) }
total =40
no containing 2 =10
P(E)=10/40=1/4
=0.25 ans
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