Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random what is the probability that the ticket drawn bears a number which is a multiple of 3
Answers
Answered by
8
6/20=3/10..........is the probability .
sujataswami26:
Thank you
But How 6/20
As there are 6 multiples of 3 betweeen 1 to 20.....
Answered by
12
S={ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19}
n(S)=20
let A is event that ticket drawn bears multiple of 3
A={3 6 9 12 15 18}
n(A)= 6
P(A)=n(A)/n(S)
= 6/20
=3/10
n(S)=20
let A is event that ticket drawn bears multiple of 3
A={3 6 9 12 15 18}
n(A)= 6
P(A)=n(A)/n(S)
= 6/20
=3/10
Similar questions