Question

One lottery ticket is drawn at random from a bag containing
20 tickets numbered 1 to 20. Find the probability that the number
on the ticket is (i) divisible by 4 (ii) the prime number.
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Answer 1

Answer:

(i) 1/4 (ii) 2/5

Step-by-step explanation:

(i) Between 1 and 20 there are 5 numbers divisible by 4 i.e. 4,8,12,16 and 20 so the probability is 5/20 = 1/4

(ii) Between 1 and 20 there are 8 prime numbers i.e. 2,3,5,7,11,13,17 and 19 so the probability is 8/20 = 2/5

Answer 2

Answer:

One lottery ticket is drawn at random from a bag containing 20 tickets numbered 1 to 20. Find the probability that the number on the ticket is (i) divisible by 5 (ii) the prime number.