Question

Sean has a collection of coins. One tenth of the coins are from Europe. Thirty-two hundredth are from Asia. The rest are from Africa. Write a decimal to show the total part of the coins that are from Europe or Asia.

Answer 1

lets write each part, the total will be x:
(1/10)x = Europe
3200 = Asia
x - (1/10)x - 3200 = Africa

Europe + Asia = (1/10)x + 3200 = x/10 + 3200
= (320x + 1)/3200
that would be expressed as a fraction, and depends on the total of coins, x

Answer 2

Answer: 0.42

Explanation:

Let the total number of coins be x.

The part of coins are from Europe =
`(1)/(10)`

Then, the number of coins from Europe =
`(1)/(10)x=0.10x`

The part of coins are from Asia =
`0.32`

The number of coins from Asia=
`0.32x`

Now, the number of coins from Europe or Asia =
`0.10+0.32x=0.42`

Hence, the total part of the coins that are from Europe or Asia=0.42