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Andayatristan2go
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what is the probability that the number of boxes delivered will be at least 35 but not more than 45​

Sagot :

Angelobejocgo

D. Find P(X ≤ 45)= P(45) + P(42) + P(40) + P(37) + P(35)

= 3/10 + 1/5 + 1/10 + 1/5 + 1/10

= 3/10 + 2/10 + 1/10 + 2/10 + 1/10

= 9/10 or 0.90

Other solution:

Find P(X ≤ 45)= 1 -P(50)

= 1 - 1/10

= 9/10

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