Question

5) 20 out 50 rolls of a number cube resulted in a 2 being rolled. Based on this information, if the cube was rolled 220 times, how many rolls of a 2 could be expected? A) 37 B) 66 C) 88 D) 99

Answer 1

C) 88

Explanation:

20 out of 50 is same ratio as:

• 20/50 = 2/5

Applied to the number 220 we get:

• 220*2/5 =88

So expected number is 88

Correct answer choice is C