"It's not clear how many people have become zombies, but it's definitely indispensable." Liu Haihao's voice broke the silence. He looked at Wang Le'er with a pale complexion through the rearview mirror, thinking that this professional white-collar worker might be frightened.

After a pause, Liu Haihao continued: "When the disaster occurred, I happened to unload the goods in the freight distribution center. At that time, there were still many people in the distribution center. Including the loaders and unloaders, the drivers, there were about 180 in total. I remember that about a dozen people turned into zombies at that time, and then launched an attack on the workers around me..."

"I happened to be sitting in the car at that time, so I escaped!"

"So, in the 100 people, nearly 100 have become zombies?" Su Ziyan's voice sounded.

"Miss Su is right. At that time, there were only a hundred people in total. There were about eleven or two who turned into zombies in the first wave, almost 10%."

"Just call me Ziyan."

Hearing the name "Miss Su", Su Ziyan subconsciously frowned, "Suppose the probability of zombies is 10%, and the permanent population of Binhe City is about 8 million, which means that in this wave of mutation, at least 800,000 people have become zombies?"

Zhang Wenming nodded affirmatively and added: "Of the eight million permanent residents, not counties and cities, at least 1.5 million live in the main urban area. In other words, there are now more than 150,000 zombies in the city! If the secondary mutation after being bitten is included, the total number of zombies will be even greater!"

After hearing this, Su Ziyan frowned and said, "If thirty of the 100 people are attacked, then including the mutated zombies, almost forty or fifty will turn into zombies!"

"Will this happen? Some people were attacked by zombies but did not turn into zombies?"

"We have never encountered the situation Zi Yan said, and we cannot make an accurate judgment. However, from the scene I saw at the freight distribution center, the people attacked by zombies have become zombies, and there seems to be no exception." Liu Haihao shook his head, but he denied Su Ziyan's statement.

Su Ziyan opened her mouth and said nothing.

"Wouldn't that mean half of the people will become zombies? That city is already the world of zombies?" Su Ziling said in a pale face and said in horror.

"Yes, there are so many zombies in Binhe City alone. Aren't there hundreds of millions of zombies in the country? Be good, I'm so grateful this time!" Jiang Yan's face trembled and he said in surprise. A scene of zombies everywhere appeared in his mind.

Su Ziyan's expression was also a little ugly. She whispered: "Suppose the first wave of mutation rate when the doomsday happened is 10%. Including the secondary mutation that was bitten later, it is indeed half the way!"

Half of the people turned into zombies, which is a very heavy number!

In a trance, everyone lost confidence in the future.

"No! You can't calculate that!"

Su Ziyan suddenly shook her head again.

"What do you mean?" Jiang Yan asked unexpectedly.

Su Ziyan said: "Don't forget that the doomsday happened just at night. At this time, most people should sleep at home. Isn't the house the best barrier?"

Without waiting for others to ask, she continued: "We can calculate that if the zombie mutation rate in the first wave is 10%, in short, let's calculate it with 10%. What is the probability that someone in a family of two will become a zombie? 19%! And the probability that neither of them will become a zombie is 81%! So, the probability that someone in a family of three will become a zombie is 27.1%, and the probability that no one will become a zombie is 72.9%!"

"Huh!" Jiang Yan was surprised, as if he had heard some signs, "If you count this way, the probability that a member of the family of four will become a zombie is..."

"34.4%!" Su Ziyan added.

"Yes, 34.4%! Yes, it's midnight, everyone is sleeping, and the survival rate of a single family is still very high!"

Zhang Wenming also reacted at this time and looked at Su Ziyan, "Ziyan, please help me calculate what is the specific probability of a corpse in a family of four?"

Su Ziyan nodded and thought for a while, "If it is a family of four, then the probability of one of the family members becoming a zombie is 29.2%, the probability of two becoming zombies is 4.86%, the probability of three becoming zombies is 0.36%, the probability of the whole family becoming zombies is 0.01%, and the probability of no one in the family becoming zombies is 65.6%!"

"Ah, sister, why has your math become so good?" Su Ziling asked in surprise. The others in the car also looked at her with surprise. Su Ziyan's calculation speed just now was indeed too fast.

Su Ziyan was also stunned. She just subconsciously calculated it. At this time, she realized that her speed was a bit amazing. When did her calculation ability become so powerful? Is this also a side effect of transformation?

You should know that although the probability calculation just now is not complicated, there are still some calculations. It is impossible for ordinary people to get the answer through mental calculation in such a short time.

Zhang Wenming did not stop on this topic. He changed the topic and said: "A family of four, even if someone turns into a zombie, due to the isolation effect of the internal room, it is very likely that someone will survive. In addition, there is a 65.6% chance that no one will become a zombie at all, so the overall survival probability of the family of four will be more than 70%!"

"And a family of two, the family of three has a greater survival probability, exceeding 80% and close to 80% respectively! In other words, since it happened at night, people who stayed at home have a greater survival probability?"

Everyone reacted, just imagine, if the zombies broke out during the day, although the daylight gave everyone a faster reaction, there were so many people in the workplace, shopping and entertainment venues that often they could not find shelter in time, especially in the bustling shopping malls, which might be more casualties awaiting them.

Of course, it is precisely because it is night that the people in the collective dormitory suffer greater harm. Every drink and peck, and you lose sight of the other. As long as one person becomes a zombie, it will be a disaster for everyone in the collective dormitory.

"To be precise, from a mathematical perspective, the short-term damage caused by this zombie disaster is indeed much smaller than expected, but if this family hears a sound from outside without knowing it and opens the door, this is the real injury!"
Chapter completed!