The probability that a vehicle will change lanes while making a turn is 55%. Suppose a random sample of 7 vehicles are observed making turns at a busy intersection. (a) Find the probability that no more than 4 vehicles will change lanes while making the turn.
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\[ P(X=0) = \binom{7}{0} \times (0.55)^0 \times (1-0.55)^{7-0} = 1 \times 1 \times 0.002476 = 0.002476 \] Show more…
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