There are a total of 190 pieces of 10-cent coins, 20-cent coins and 50-cent coins in Asher's piggy bank.
25 of these coins are 10-cent coins. The number of 50-cent coins is five times the number of 20-cent coins.
- How many 50-cent coins are there?
- What is the total value of the 50-cent coins in Asher's piggy bank?
(a)
Number of 10-cent coins
=
25 x 190
= 76
Number of 20-cent coins and 50-cent coins
= 190 - 76
= 114
Number of 20-cent coins = 1 u
Number of 50-cent coins = 5 u
Number of 20-cent coins
= 1 u + 5 u
= 6 u
6 u = 114
1 u = 114 ÷ 6 = 19
Number of 50-cent coins
= 5 u
= 5 x 19
= 95
(b)
100¢ = $1
Total value of the 50-cent coins in Asher's piggy bank
= 95 x 50
= 4750¢
= $47.50
Answer(s): (a) 95; (b) $47.50