A six-sided number cube is to be rolled 30 times. How many times do you expect to roll on an even number?(1 point)
Since a six-sided number cube has 3 even numbers (2, 4, 6) out of 6 total numbers, the probability of rolling an even number on any one roll is 3/6 or 1/2.
To find the expected number of times to roll an even number in 30 rolls, we multiply the probability of rolling an even number on any one roll by the total number of rolls:
Expected number of times = (1/2) * 30 = 15
Therefore, you would expect to roll an even number 15 times in 30 rolls.