From the first 20 natural numbers, Ram selects a number at random. What is the number of favourable outcomes, if this number has to be divisible by 4?
5
The numbers from 1 to 20 that are divisible by 4 are: 4, 8, 12, 16 and 20. Thus there are 5 numbers from 1 to 20 that are divisible by 4. Thus any one of these 5 numbers can be picked to get a favourable outcome. In other words there are 5 favourable outcomes.