1. A craftsperson is able to etch 25 windows per day if they are able to sue the laser etching device and 8 windows a day id the y must etch by hand. If they can use the laser etching device 70% of the time, find the expected number of windows they can etch by hand.
2. There are prize drawing for a new computer and a new stereo system. Suppose there are 1500 raffle tickets sold at $5 each. The computer is worth $1000 and the stereo system is worth $500. What is the expected value if you buy one ticket?
3. A game show gives away 2 new cars. One car is worth $50,000 and the other car is worth $40,000. Two members of the audience are randomly selected to participate and recieve one of the two cars. What is the expected value if you are randomly chosen and you had to pay $4 to be a member of the audience with 1999 other people.
2. There are prize drawing for a new computer and a new stereo system. Suppose there are 1500 raffle tickets sold at $5 each. The computer is worth $1000 and the stereo system is worth $500. What is the expected value if you buy one ticket?
3. A game show gives away 2 new cars. One car is worth $50,000 and the other car is worth $40,000. Two members of the audience are randomly selected to participate and recieve one of the two cars. What is the expected value if you are randomly chosen and you had to pay $4 to be a member of the audience with 1999 other people.
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1.
0.75*25+0.3*5=17.5+1.5=19 windows
0.75*25+0.3*5=17.5+1.5=19 windows
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its easy but it takes a long time. so i chose not to do it xD sorrry!