you toss 3 coins what is the probability that you get exactly 2 heads given that you get at least one head?
strange change
17p = 2p + 5p + 10p
A 20p and a 5p
They are in fact two different devices that are commonly mistaken. A "measuring stick" is a stick of a given length that is used to reference another object from it's total length. These usually have no markings as such, or any calibrated length. A "ruler" (aka straightedge) IS calibrated and has measurement markings. It is used to "rule" straight lines to an exacting measurement. Originally designed for the engineering industry, they have been useful in countless other areas throught history. A 2 second google search revealed this: http://en.wikipedia.org/wiki/Ruler
italian
Numismatics is the study of coins.
No, it is not. It's simply referred to as "the mark", and no details are given.
Tokens
ALL us minted coins by stated value for a given year
The spanes
Originally, it is printed (or "minted", in the case of coins) on behalf of some government.
strange change
Originally, it is printed (or "minted", in the case of coins) on behalf of some government.
There are no 20cent coins. And you can't solve that question with the information given. You need the dimensions of the coins
A tally clerks is a person who tally the cargo by count, number, markings and identifications with a list given by the shipper so as to confirm the count and markings of the cargo in transit.
Silver coins are typically shinier and have a higher metallic sound when dropped compared to pewter coins. Silver coins are also heavier than pewter coins due to their higher density. Additionally, silver coins may have distinct markings or engravings indicating their silver content.