Question 756522
Find how many of the coins in the cup have "n" in their names.
That is 6 nickels + 10 pennies = 16 coins with "n" in their names.
 
Divide by the total number of coins.
The total is 4 quarters + 5 dimes + 6 nickels + 10 pennies = 25 coins
{{{16/25}}} of the coins have  "n" in their names.
So the probability that one coin selected at random has a letter "n" in its name is
{{{16/25=0.64}}}=64%