Let's assume
number of quarters is q
number of nickels is n
Kevin and randy muise have a jar containing 60 coins
so,

now, we can solve for n

we know that
1 quarter =0.25 dollar
1 nickel = 0.05 dollar
now, we can set equation for value

now, we can replace n

now, we can solve for q



now, we can solve for n


so, number of quarters is 36
number of nickels is 24.................Answer