Question

cards each marked with one of the numbers 8,9,10,11,12,.....,30 are placed in a box and mixed thoroughly. one card is drawn at random from the box. find the probability of getting :-
1) an even number
2) an odd number
3) a prime number
4) a number multiple of 5
5) a number divisible by 3

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Answer 1

Answer:

1) n(s)=27

E: an event of getting an even number

n(e)=12

p(e)=n(e)/n(s)

=12/27

=4/9

2)n(s)=27

E: an event of getting an odd number

n(e)=11

=p(e)=11/27

3)n(s)=27

E:an event of getting a prime number

n(e)=6

p(e)=6/27

=2/9

4)n(s)=27

E:an event of getting a number multiple of 5

n(e)=5

p(e)=5/27

5)n(s)=27

E:an event of getting a number divisible by 3

n(e)=8

p(e)=8/27

Hope the answer may help to you