Question

4. A traffic control engineer reports that 60% of the vehicles passing through a checkpoint are from within the state. What is the probability that fewer than 2 of the next 9 vehicles are from out of state? Use the Binomial table from the back of the book.

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Rawan Badran

Answer 1

Giun n=9 let X: number of vehicles from out of state Xu Binomial (n=9, p=0.4) x is pim-f of P [x=d] = Kn Cx pr C1-pl 2=0, 1,2-.-n

Required probability is P(x (2) = plazo) + P(x-1) = 96 couscas + 9 (104) (06) 0.010077 + 0.0605 0.0705 Answer=0.0705 ✓