Politics. If 10,857 people voted for a politician in his first election, 12,576 voted for him in his second election, and 8,278 voted for him in the first and second elections, how many people voted for this politician in the first or second election? (...) 15155

To find the number of people who voted for the politician in the first or second election, we need to add the number of people who voted in each election and subtract the number of people who voted in both elections.

Number of people who voted in the first or second election = (number of people who voted in the first election) + (number of people who voted in the second election) - (number of people who voted in both elections)
= 10,857 + 12,576 - 8,278
= 22,433 - 8,278
= 14,155.

Therefore, 14,155 people voted for this politician in the first or second election.

To find out the total number of people who voted for the politician in the first or second election, we need to add the number of people who voted in the first election, the number of people who voted in the second election, and then subtract the number of people who voted in both elections to avoid double counting.

First, let's find the number of people who voted in the first election:
10,857 people voted in the first election.

Next, let's find the number of people who voted in the second election:
12,576 people voted in the second election.

Now, let's find the number of people who voted in both elections:
8,278 people voted in both the first and second elections.

To calculate the total number of people who voted in the first or second election, we can add the number of people who voted in the first election (10,857) and the number of people who voted in the second election (12,576) and subtract the number of people who voted in both elections (8,278):

Total = (Number of people who voted in the first election) + (Number of people who voted in the second election) - (Number of people who voted in both elections)
Total = 10,857 + 12,576 - 8,278
Total = 22,433 - 8,278
Total = 14,155

Therefore, a total of 14,155 people voted for the politician in the first or second election.