Question

4 men throw a die each simultaneously. find the probability that at least 2 people get the same number

Answer 1

Answer: 13/18

We will solve this in an easy to understand stepwise manner. Here we go: 

A person will throw a dice, and he will get a number. Now, the probability that the second person will not get the same number is 5/6 (Right? If you don't understand how, ask in the comments). 

Similarly, the probability that the third person will not get the same number is 4/6 and that of the fourth person is 3/6.

Now, what is the probability that all people get different numbers? 

1 × 5/6 × 4/6 × 3/6 = 5/18 

∴ P(at least 2 people get the same number) = 1 - 5/18 = 13/18

Answer 2

probability of people get different no....
=1×5/6×4/6×3/6
=60/216
=30/108=15/54=5/18

=5/18

p (at least 2 people get same number)
=1-5/18
=13/18
...★★★★★★