Question

2) A two digit number is to be formed from the digits 0, 1, 2, 3, 4. Repetition of the digits is
allowed. Find the probability that the number so formed is a -
(1) prime number
(2) multiple of 4 (3) multiple of 11
​

Answer 1

Answer:

Numbers are:

10,11,12,13,14,20,21,22,23,24,30,31,32,33,34,40,41,42,43,44

1) Prime number

11,13,23,29,31,37,41,43

P=

20

8

2)Multiple of 4

12,16,20,24,28,32,36,40,44

P=

20

9

3)Multiple of 11

11,22,33,44

P=

20

4