Ehtimоllar nazariyasi va matematik statistika


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N128. Fan bobi – 1, Fan bo‘limi – 2, Qiyinchilik darajasi 2.



Qutida nomerlangan oltita bir xil kubik bor. Hamma kubiklar tavakkaliga bittalab olinadi. Olingan kubiklarning nomerlari ortib borish tartibida chiqish ehtimolligini toping.

1/720

1/6

3/4

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N129. Fan bobi – 1, Fan bo‘limi – 2, Qiyinchilik darajasi 2.



Agar bo`lsa, B hodisaga qarama-qarshi hodisaning ehtimolligini toping.

0,27

0,3

0,73

0,5

N130. Fan bobi – 1, Fan bo‘limi – 2, Qiyinchilik darajasi 2.



Yashikda 100 ta detal bo‘lib, ulardan 10 tasi yaroqsiz. Tavakkaliga 4 ta detal olingan. Olingan detallar orasida yaroqsiz detallar bo‘lmasligi ehtimolligini toping.



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