On Mathematical Formulas, Probability and Probability

The result of adding the dice thrown by 1, a and b can be expressed as (1, 1) (1, 2) (1, 3)...(9, 9) and so on. Through observation, it can be concluded that the sum of odd and even numbers is distributed sequentially, and the probability of odd or even numbers is about 1/2 (among all possible distributions of 8 1, odd numbers account for 40 times, and even numbers account for 4/kloc-0 times).

2. We know that the probability of throwing odd numbers and even numbers is the same, each accounting for about 1/2. Therefore, the probability of throwing an odd number n times in a row is the n power of 1/2, and the probability of throwing an even number n times in a row is also the n power of 1/2, so in this case, the probability of throwing an odd number plus n times in a row is the n power of 40/8 1, and the probability of throwing an even number plus n times in a row is 4/kloc-0.

3. This problem can be simplified as the probability of even sum in 10000 times. So10000 * 41/81is about 5062 times. Of course, we need to consider the existence of deviation. The calculation deviation can be calculated by the square root of the total number of times. Simply put, the square root of 10000 is 100, so according to the law of large numbers, the number of even sums should be between 4962 and 5 162. So C can guess correctly 4962 to 5 162 times, with a percentage of 49.62% to 5 1.62%.