Question

I roll the dice 20 times. what is the probability of rolling a one or two?

Answer 1

The answer is 1:30 or 1/30.

There are 6 possible outcomes from rolling a dice, so you multiply 6 and the amount of times rolled, in this case its 20.

6 x 20 = 120

It says what is the probability of rolling 1 or 2 from the 20 rolls. So you multiply 2 and 20, which gives you 40. 

The probability is 40/120, but you must simplify it, by dividing both sides of the fraction by its greatest common factor. The GCF is 40, so it is 1/30

Answer 2

1/3 is the answer or 2/6