4 pairs of white socks are priced at $7.20 at a shop. A shopkeeper sold 12 such pairs of white socks to one customer and 18 such pairs to another customer. How much money did he collect altogether from the two customers?
2007-01-07 19:24:02 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
4 pairs = $7.20.
The shopkeeper sold (12 + 18) = 30 such pairs.
Set up a ratio:
4 pairs / 7.20 = 30 pairs / x;
Solve for "x":
4 x = 30 (7.20);
x = 30 (7.20) / 4;
x = 54.00;
Note: You can also find the price of individual pair (7.20 / 4) and multiply it by pairs of socks sold (12 + 18) = 30 pairs.
You'll get:
(7.20 / 4) (30) = 54.00
The shopkeeper collected $54.00 altogether from the two customers.
2007-01-07 19:29:13 · answer #1 · answered by Esse Est Percipi 4 · 0⤊ 1⤋
Do it in parts...
Find how much it costs for a single pair of socks...
$7.20/4 pairs = $1.80 per pair
Add the customers amount of pairs together...
12 + 18 = 30
And since I am doing this in my head, Im going to break this down into two different parts...
$1 x 30 = $30
$0.10 x 30 = $3 x 2 = $6 ($1 - $0.20 = $0.80) vvv
$30 + $30 - $6 = $54
The shopkeeper collected $54 from the customers' transactions.
Hope this helps!
2007-01-08 03:37:24 · answer #2 · answered by Robert B 2 · 0⤊ 0⤋
2 ways to approach this
1. How much does one pair cost ($7.20/4) x 30 pairs (18+12)
OR
2. 4 pairs/ 7.20 = 30/x;
4x =30 x 7.20, divide both sides by four and x = the cost of 30 pairs
2007-01-08 03:32:43 · answer #3 · answered by lynn y 3 · 0⤊ 0⤋
4 pairs sell for $7.20
12 pair sell for 12 x 7.2 divided by 4 = 21.60
18 pair sell for 18 x 7.2 divided by 4 = 32.40
He collected $54.00
2007-01-08 10:08:56 · answer #4 · answered by David C 2 · 0⤊ 0⤋
4 pairs costs $7.20
1 pair costs $ 7.20/4=$1.8
12 pairs = 12 x $ 1.8=21.6$
18 pairs = 32.4$
total = $54
2007-01-08 03:32:58 · answer #5 · answered by srinu710 4 · 0⤊ 0⤋
$54
2007-01-08 03:33:42 · answer #6 · answered by Anonymous · 0⤊ 0⤋