What is the median for the given set of data?

{40, 54, 22, 30, 55, 13, 33}
A) 32
B) 33
C) 40
D) 42

Step-by-step explanation:

Arranging in ascending order, we get

13 , 22 , 30 , 33 , 40 , 54 , 55

no of data (N) = 7

Now Position of Median

= {(N +1 ) / 2}th item

= {(7+1) / 2 } that item

= 4 that item

So now exact median = 33

It is expected to lose 5.10 dollars

Step-by-step explanation:

The probability of getting a 3 by throwing a die once is 1/6.

By throwing it 3 times the probability of not getting a 3 is:

Then the probability of obtaining a three at least once in the 3 attempts is:

So if X is the discrete random variable that represents the amount gained in a single move of this game, the expected gain E(X) is: