Question

Anya's piggy bank is full of Rs 10 and Rs 5 coins. it contains three times as many Rs 5 coins as Rs 10 coins .The total amount of money in the piggy bank is RS300. How many coins of Rs 10 are there in the Piggy Bank?

๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏๏_๏

Answer 1

Let the number of ₹ 10 coins be x.
Hence, Number of ₹ 5 coins = 3x

Net amount of total number of ₹ 10 coins = 10 * x = ₹ 10x

Net amount of total number of ₹ 5 coins = 5 * 3x = ₹ 15x

Total amount in piggy bank = ₹ 10x + ₹ 15x = ₹ 25x

But, according to the question,
Total amount in piggy bank = ₹ 300

Therefore,

25x = 300
OR x = 300 ÷ 25
OR x = 12

Now we know that,

Number of ₹ 10 coins = x = 12

Answer 2

$\bf\huge\boxed{\boxed{\boxed{Cybary\:Radhe\:Radhe}}}$

Suppose the number of ₹ 10 coins be p.

Therefore

Number of ₹ 5 coins = 3p

Net amount of total number of ₹ 10 coins = 10 × p

= ₹ 10p

Net amount of total number of ₹ 5 coins = 5 × 3p

= ₹ 15p

Total amount in piggy bank

= ₹ 10p + ₹ 15p

= ₹ 25p

Total amount in piggy bank = ₹ 300

Hence

25p = 300

p = $\bf\huge\frac{300}{25}$

p = 12

According to the question

Number of ₹ 10 coins  

P = 12

$\bf\huge\boxed{\boxed{\boxed{Radhe\:Radhe}}}$

$\bf\huge\boxed{\boxed{\boxed{Together\:we\:go\:far}}}$