At a school's open house, T-shirts and sweatshirts were sold. Each item was purchased by either...

 

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At a school's open house, T-shirts and sweatshirts were sold. Each item was purchased by either a student or a parent. The two-way frequency table summarizes a random sample of 60 items sold that night. Student Parent T-shirt 11 27 Sweatshirt 13 Let sweatshirt be the event that an item randomly chosen from among those sold was a sweatshirt. Let parent be the event that an item randomly chosen from among those sold was purchased by a parent. Find the following probabilites. Write your answers as decimals. (if necessary, consult a list of formulas.) (a) P(parent) =0 %3! (b) Plsweatshirt and parent) = () P(sweatshit I parent) -U At a school's open house, T-shirts and sweatshirts were sold. Each item was purchased by either a student or a parent. The two-way frequency table summarizes a random sample of 60 items sold that night. Student Parent T-shirt 11 27 Sweatshirt 13 Let sweatshirt be the event that an item randomly chosen from among those sold was a sweatshirt. Let parent be the event that an item randomly chosen from among those sold was purchased by a parent. Find the following probabilites. Write your answers as decimals. (if necessary, consult a list of formulas.) (a) P(parent) =0 %3! (b) Plsweatshirt and parent) = () P(sweatshit I parent) -U