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1. PT Buana Jaya Hotel di Jakarta mengoperasikan hotel dengan kapasitas 50 kamar eksekutif. Namun demikian setiap kamar tidak selalu terisi penuh. Manajemen memberikan perhatian

1. PT Buana Jaya Hotel di Jakarta mengoperasikan hotel dengan kapasitas 50 kamar eksekutif. Namun demikian setiap kamar tidak selalu terisi penuh. Manajemen memberikan perhatian terhadap ini, dan mencatat berapa probabilitas kamar kosong. Berikut gambaran distribusi frekuensinya.

X 0 1 2 3 4 5

P(X) 0,1 0,2 0,3 0,2 0,15 0,05

Hitunglah rata-rata hitung dan standar deviasinya! Berapa interval kamar kosong ?

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