Question

Thirty identical cards are marked with numbers 1 to 30. If one card is drawn at random, find the probability that it is: 

 a multiple of 4 or 6 

Answer 1

There are 30 cards from which one card is drawn. 

Total number of elementary events =n(s)=30  

From numbers 1 to 30, there are 10 numbers which are multiple of 4 or 6 i.e {4,6,8,12,16,18,20,24,28,30} Favourable number of event =10 

Probability os selecting a card with a multiple of  4 or 6 

`(n(E))/(n(s))=10/30=1/3 `