A primary school question can be controversial? Calculate that it will be yours!

That's it. Let's say he only had one piece of clothing and 100 yuan.

Now the young man gave him 100 yuan, and he went to the neighborhood and exchanged it for 100 yuan, and he found the young man for 79 yuan and gave him a piece of clothing, and he had one less piece of clothing for his own things, and 21 yuan more, and the cost of the clothes was 18 yuan, and he earned 3 yuan.

And then I gave the neighborhood 100 yuan, and 100 less, which adds up to 97 yuan less.

Boss Wang's purchase of items: -18

Boss Wang has no change, so he gave it to the young man: -79

Neighbors to Boss Wang: 100

Boss Wang returned the neighborhood: -100

Total: $97 lost.

Sell something: -18

Change: -79

Also neighbors: -100

Total profit: -197

Absolutely, yes.

97 yuan Looking at other data is misleading Just look at how much he paid in the end 100 (once borrowed 100) and 18 yuan (cost) gifts, and 79 for young people, should be 18 + 79 = 97 (yuan).

The boss took out 100 yuan from the cash cabinet to return it to the neighbor, and lost another 18 yuan product.

A total of 118 yuan.

97 yuan, and also borrowed 100 yuan from a neighbor, 79 yuan to a young man, and lost 18 yuan in goods, a total of 97 yuan.

Before the boss supplies the neighbor 100 yuan, the boss earns 3 yuan, the guy earns 97 yuan, and the neighbor loses 100

So Answer: 97

The loss is the cost of 79+ for the young man, 18, a total of 97 yuan, and nothing else.

Is this topic difficult, for those who have a high school foundation, it is not even a topic!

The key is the understanding of "probability"....

Probability is the probability that an event will "happen".

The event has already happened when you select box A "winning" (winning or not has already been determined since 1 million has been placed in 1 of the boxes before that.) ）

At the same time, the "probability" of winning the lottery has been determined (1 3).

How can what happens after that affect the probability of the previous event?

Isn't that....

As an aside, this topic is a little "winding" is, at this time, the probability of choosing box C"? （2/3）

Most people, thinking it is the same, is 1 3 or 1 2. That is, if there is an opportunity to re-select box A or box C, it is obvious that box C should be chosen (the probability of winning is increased by 1 times).

To start, choose any 1 and the probability of winning is 1 3, (the probability of not winning is 2 3.) After selecting (such as box A), something happened (box B was empty when opened), that is, at this time, 1 million is not in box A, but in box C, so the probability of winning in box C is 2 3 (that is, the probability of box A not being hit).

It should be noted that the opening of box B occurs before box C is selected, so it has an effect on the probability of choosing box C, but not on the probability of choosing box A before.

If there are 100 boxes, choose 1 at random, the probability is obviously 1 100, and then, open 98 empty boxes, then, choose the remaining box, the probability of winning is 99 100....

This is an ambiguous question.

If the host knows which box 1 million is in and must open an empty box, then the answer is 1 3, you can do experiments with your classmates by yourself, take three paper tubes, put an eraser or something in them, let your classmates be the host, do 100 experiments, record the success rate by yourself and find the problem. In fact, if you choose, the host can choose a box at will, and if you choose the wrong one, the host actually has only one choice, and the two situations are not equal. The probability that you will be selected at the beginning is 1 3, and since the host will definitely open an empty box and come out, then this result is determined, so it will not add any useful information to your initial selection, and thus will not affect the probability of your initial selection.

Or you can consider the extreme point of the case, if there are 100 boxes, after you select one, the host opens 98 boxes are empty, then I don't think anyone will think that the box that starts to select will have the possibility of 1 2.

If the host doesn't know which box the 1 million is in or even if he does, he just opens a random box and finds it empty, then the answer is 1 2. You can still consider the example of 100 chests, where the host doesn't open 98 boxes in a row, which becomes a 2% small probability event, and the relative probability of you is also increased from 1% to 1% 2% = 1 2. (In the above case, it is inevitable, and the probability of you is still 1%)

The probability should be 1 3If you find that box B is empty, then in the opinion of the contestant, the probability of containing 1 million in box A should be 1 2

Since box B has been opened and is empty, the probability of the contestant's choice at this time should be 1 in 2. If the host does not open box B, the probability that the contestant chooses box A contains 1 million should be 1 in 1.

I took a look at it when I had nothing to do, and I was entangled. The question is what is the probability that A has 1 million in it? It's not about asking him what the probability is of choosing A. It's nothing more than there or nothing.

Two-thirds, believe me, after all, they are people who have been devastated by the Olympiad.

One-in-two, here's the conditional probability.

Solution: He sold a total of 4 people to burn cakes, and he sold a total of the number of baked cakes:

1 + 2 + 4 + 8 = 15 pcs.

First, the answer is not Huai Yu includes.

There are 12 months in a year, 7 large months, 4 small months, 31 days in the big month, 30 days in the small month (except February), 2. Not (0 and 1 are not prime numbers).

3. Count. Fourth, the day before.

That's right, you take 10,000.

He took (500-390-42) 10,000).

It depends on whether the 420,000 yuan loan from the bank is counted in the total expenditure of 3.9 million, if not, your friend's algorithm is correct. If the 420,000 yuan bank loan has been included in the total expenditure, it should be multiplied by 30% of your capital contribution ratio without deducting 420,000 yuan! The former algorithm is:

Your friend can calculate the dividend (500-390-42) * 10,000. The latter is: (500-390) * million.

Wrong. Correct Calculation Method:

500-390 = 110 (10,000).

110-42 = 78 (10,000).

78 30% = 10,000).

Bank loans should be deducted from profits.

Calculate it with you like this, you will be clear, put aside the 420,000 first, and only count it in and out of the account.

Here's how the algorithm goes:

The balance is 5 million - 10,000 - 3.9 million 1.1 million.

Your dividend: 1.1 million.

The loan you need to repay: 420,000.

The money you can get in the end: 330,000,000.

So it's clear.

The 420,000 should be included in the total expenditure. 5 million-3.9 million again, you should be 330,000.

First, the multiplication integral of age is solved for prime factors.

The sum of the ages is 102, meaning that the ages are between 1-102, so the possible age is 191. The genus is the same, meaning that the age difference is a multiple of 12, so that 1,13,25,49 of them can be grouped, 5,65 can be grouped, and 7,91 can be grouped. If you want to multiply the product as a problem, the group must have 5, 7, 13 or multiples thereof, so only the first group can.

Then make up the numbers. So there are 6 people in total, 2 1 years old, 2 13 years old, 1 25 years old, and 1 49 years old.