jumana3
08.01.2020 •
Mathematics
Afair die is rolled repeatedly. let x be the number of rolls needed to obtain a 5 and y the number of rolls needed to obtain a 6. calculate e[x∣y=2].
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Ответ:
y + 4 = -2
y = -4-2
y = -6
xy - 2x = 16
-6x - 2x = 16 (putting y = -6)
-8x = 16
8x = -16
x = -16/8
x = -2
Step-by-step explanation:
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