Question #4 ASAP A novelty coin has a probability of 0.6 of coming up heads when

Question

Question #4 ASAP

A novelty coin has a probability of 0.6 of coming up heads when flipping. Let X represents the number of heads when this coin is tossed twice. Find the expected value of X. Suppose that on particular highway accidents occur at the rate 1.2 per week. What is the probability that at least two accidents w l occur during next three weeks? The cross-section area of plastic tubes for use in pulmonology is normally distributed with the mean of 12.5 mm2 and standard deviation 0.2 mm2. When the area is less than 12 mm2 or greater than 13 mm2, the tube does not fit properly. How many wrong-sized tubes can doctors expect in the box of ten thousand tubes?

Explanation / Answer

4) Expected value of X = (probability of X) x (number of attempts)

= 0.6 x 2

= 1.2

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