Consider an experiment in which a fair coin is tossed repeatedly. Let random variable X be the number of the toss when the first head occurs, and let y be the number of the toss when the first tail occurs. (For example, if the sequence begins HHHTHTT, then X = 1 and Y = 4.) 1. Find the joint PMF of X and Y. Be sure to consider which pairs of x, y values can or cannot occur. 2. Are X and Y independent?

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mean, 40.6

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she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

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hello umm i don't understand your question can you explain it more pls

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