Question

If you roll a normal dice 120 times. How many odd numbers would you expect to get

Answer 1

1,3,5 out of 1,2,3,4,5,6.
This means there's a 50% chance of an odd number, so 120/2 = 60

Answer 2

60 odd numbers

Explanation:

A normal dice has 6 different sides numbered from 1 to 6, each side has the same probability of appearing when you roll the dice, i.e., in the long run each number will appear 1/6 of the times. We have three different odd numbers in a normal dice each will appear 1/6 of the times in the long run. Therefore, in the long run we hope to get 3/6 = 1/2 of the times an odd number and rolling the dice 120 times will produce about 120(1/2) = 60 odd numbers.