Question

Ticket numbered from 1to 20 are mixed up together and then a ticket is drawn at random what is the probability that the ticket draw has a number which is multiple of 3 and 7?

Answer 1

S = { 1,2,3,4,5,6,7,8,9,10,11,12,

13,14,15,16,17,18,19,20 }

n(S) = 20

A = { 0 }

P (A) = n(A)/n(S)

= 0/20

= 0

P (A) = 0.