The probability of liking you
"Actually, I've always liked you." "Whether we're together or not..." There's a line in *5 Centimeters Per Second*: A person will meet approximately 29.2 million people in their lifetime, and the probability of two people falling in love is 0.000049. I looked up how 0.000049 was calculated: The world population is over 6 billion. A lifetime has: 80 * 365 = 29,200 days . On average, you can meet about 1,000 people per day. The total number of people you meet in your lifetime: 29,200 * 1,000 = 29,200,000. The probability of meeting each other is: 29,200,000 / 6,000,000,000 = 0.00487. If you live to 80, you'll probably know about 3,000 people. The probability of meeting them is: 3,000 / 6,000,000,000 = 0.0000005 (five in ten million). How many close friends does a person have in their lifetime? Probability of getting to know each other: 20/6000000000 = 0.000000003 (three in a billion) Probability of falling in love: First, to fall in love, you need to ...