Consider the following 8 numbers, where one labelled x
is unknown.

5
,

31
,

31
,

x
,

31
,

34
,

10
,

48

Given that the range of the numbers is 67, work out 2 values of
x
.

Standard deviation of 19,29,21,22,23

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

Consider an example of a deck of 52 cards: example set of 52 playing cards: 13 of each suit clubs, diamonds, hearts, and spades ace 2 3 4 5 6 7 8 9 10 jack queen king clubs diamonds hearts spades what is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.