Question

400 draws are made at random with replacement from 5 tickets that are marked -2, -1, 0, 1, and 2 respectively. Find the expected value of the number of times positive numbers appear

Answer 1

In every draw each ticket has a probability of 1/5 of being drawn.
In 400 draws the ticket marked 1 is expected to appear 400 * 1/5 times.
In 400 draws the ticket marked 2 is expected to appear 400 * 1/5 times.
the expecte value of the number of times positive numbers appear is
\[\frac{400}{5}+\frac{400}{5}=you\ can\ calculate\]

Answer 2

expected*

Answer 3

@ditto4konah Are you there?

Answer 4

am here