Question

Suppose the sample space of an experiment is:

S={1,2,3,4,5,6,7,8,9}

Let events A, B and C be as follows;


A= {1,3,5,7,9}

B= {3,6,9}

C= {2,4,6,8}
What is the probability of A and/or B

Answer 1

Answer:

Probability of A=5/9

Probability of B=1/3

Explanation:

Probability of a favorable outcome =no of favorable outcome / total no of outcome

Total no of outcome =9

No of outcome in A=5

No of outcome in B=3

Probability of A = No of outcome in A /Total no of outcome=5/9

Probability of B = No of outcome in B /Total no of outcome=3/9=1/3

Answer 2

Answer:

2/9

Explanation:

S={1,2,3,4,5,6,7,8,9}

No.of possible outcomes= n(s)=9

Favourable outcomes for event A={1,3,5,7,9}

Favourable outcomes for event B= {3,6,9}

Favourable outcomes for event C= {2,4,6,8}

Favourable outcomes for event A or B=[3,9]

No.of favourable outcomes for event A or B=n(E)=2

Probability of getting events A or B=(no.of favourable outcomes for event A or B) by no.of possible outcomes=2/9