20 pennies, 4 nickles, and 2 dimes. 3 ways.
20 + 8 = 28p
There are not 20 ways - there are only 12.
If that's the only denomination you have there's only one way: 20 nickels = $1.
Assuming the 20 are all different, there are 20C11 = 20!/(11!*9!) = 167,960 ways.
20 nickles
40
20 pennies, 4 nickles, and 2 dimes. 3 ways.
There are infinitely many answers. Let A be any whole number and let B = -A -20 Then by the closure of integers, B must be a whole number. And A + B = A + (-A - 20) = -20 Since A is arbitrary, there are infinitely many ways of choosing A and so there are infinitely many ways in which two whole numbers will make -20.
There are 41 ways.
about 8
10 ways.10 ways.10 ways.10 ways.
There are 12 ways.
20 + 8 = 28p
how many ways to make 25p using 1p 2p 5p 10p 20 coins
There are not 20 ways - there are only 12.
There are many. Various ways to make a dollar using coins. 100 pennies, 4 quarters, 2 50 cent coins, 1 50 cent coin and 2 quarters, 10 dimes, 20 nickels, and many variations. There are 293 ways to make a dollar but maybe there are more possible ways.