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Jarak rata-rata yang bisa tempuh dengan 1 liter bensin dari motor yang diselidiki adalah 38 km dengan deviasi standard 6 km. Jika jarak yang ditempuh

Jarak rata-rata yang bisa tempuh dengan 1 liter bensin dari motor yang diselidiki adalah 38 km dengan deviasi standard 6 km. Jika jarak yang ditempuh terdistribusi normal: a. Berapa persen dari motor tersebut yang hanya dapat mencapai 30 km setiap pemakaian 1 liter bensin? b. Berapa persen yang dapat mencapai antara 25 km sampai 35 km? c. 10% dikatakan motor yang berbahan bakar hemat. Berapa jarak minimalnya

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