If two numbers are selected randomly from $20$ consecutive natural numbers, find probability that the sum of the two numbers is an even number.

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Solution

There one three types of possibilities can be possible here
both are even
both are odd
one even one odd
so probability of getting an even number is $2 / 3$ .

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If two numbers are selected randomly from 20 consecutive natural numbers, find probability that the sum of the two numbers is an even number.

There one three types of possibilities can be possible hereboth are evenboth are oddone even one oddso probability of getting an even number is 2/3.

If two numbers are selected randomly from $20$ consecutive natural numbers, find probability that the sum of the two numbers is an even number.

There one three types of possibilities can be possible here
both are even
both are odd
one even one odd
so probability of getting an even number is $2 / 3$ .