A bag contains 16 cards bearing number1,2,3…, 16 respectively. one card is chosen at random. What is the probability that the chosen card bears a number which is divisible by 3?
Total number of cards = 16
Chances of drawing a numbered card which is divisible by 3 = 5 (They are 3,6,9,12,15)
Probability P() = 
Probability of drawing a numbered cards which is divisible by 3
P(card divisible by 3) = 
3