Question

There are 205 coins in a jar all of which are either nickles or quarters . The vaule of the coin in the jar is $31.85. if both of these statements are true ? , how many nickles are in the jar ?

Answer 1

Answer: There are 97 nickels and 108 quarters.

Explanation:

Let x = Number of nickels, y = Number of quarters.

As per given,

x+y = 205 ...(i)

0.05x+0.25y = 31.85 ... (ii) [1 nickel = $0.05, 1 quarter = $ 0.25]

Multiply (ii) by 20, we get

x+5y=637 ...(iii)

Eliminate (i) from (iii)

4y = 432

⇒ y = 108 [Divide both sides by 4]

Put value of y in (i), we get

`108+x=205\Rightarrow\ x= 97`

Hence, there are 97 nickels and 108 quarters.