please show how to solve step by step. thanks A. Suppose you arrive into a build

Question

please show how to solve step by step.

thanks

A. Suppose you arrive into a building and are about to take an elevator to the your floor. Once you call the elevator, it will take between 3 and 45 seconds to arrive to you. We will assume that the elevator arrives uniformly between 3 and 45 seconds after you press the button. Find . 24 O 21 o 12.1 25.5 B. At a raffle, 10,000 tickets are sold at $5 each for three prizes valued at $4,800, $1,200,and $400. What is the expected value of one ticket? -$0.64 $0.64 o $4.36 -$4.36

Explanation / Answer

Ans:

A)Uniform distribution with a=3 and b=45

mean=(a+b)/2=(3+45)/2=24

B)E = (4800 + 1200 + 400)/10,000 - 5
= 6400/10,000 - 5
= -$4.36

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