Question

1)A die is thrown once. The probability of get the number 3 and 4 is...........
2) In tossing a die, the probability of getting an odd number or a number less then 4 is...


Please reply quickly today is my exam.......

Answer 1

S={1,2,3,4,5,6} 1)A=event of getting a number 3 A={3} n(a)=1 P(a)=1/6 B=event of getting no 4 B={4} n(b)=1 p(b)=1/6 P(AUB)=1/6+1/6=2/6=>1/3 2) A=event of getting an odd number A={1,3,5} n(a)=3 P(a)=3/6 B=event of getting a number less than 4 B={1,2,3} n(b)=3 p(a)=3/6 N(A intersection B)=2 p(A intersection B)=2/6 P(AuB)=3/6+3/6-2/6=>4/6=>2/3