A six-sided number cube is to be rolled 30 times. How many times do you expect to roll on an even number
Since a six-sided number cube has an equal probability of rolling on each of its sides, there are 3 even numbers (2, 4, 6) out of 6 total numbers.
To calculate the expected number of times to roll an even number in 30 rolls, we can use the formula:
Expected value = (Total number of rolls) * (Probability of rolling an even number)
Expected value = 30 * (3/6) = 30 * 0.5 = 15
Therefore, we expect to roll on an even number 15 times out of 30 rolls with a six-sided number cube.