注目の話題: 妊娠中から旦那が無理になった; 35歳以上は無理なのですか？; 考え無しで発言する旦那に疲れた

Science,English,and math 4th

No.213　21/04/04 08:12
燻し銀三 ( 60代 ♂ IJ7P0b ) あ+あ-

《A father of nuclear weapon and the estimation on Fermi》

『Taking advantage of data which we’ve already known』

Amount of presumption, 1, the number of the people in a single household.

How many households in a big city of which population is about three million? Needless to say, a household is one and the other is four and another is ten, but we set up the average number on the single household is three.

Amount of presumption 2, the ration on the household which possesses the piano.

How many households do they have the piano in the whole Chicago?

Though the situation may have been...

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