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WAEC Mathematics 2020 Paper
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© africaexams.com
Question : 24
Total: 48
Fati buys milk at ₦x per tin sells each at a profit of ₦y. If she sells 10 tins of milk, how much does she receives from the sales?
₦(xy + 10)
₦(x + 10y)
₦(10x + y)
₦10(x + y)
Validate
Solution:
Concept:
Selling price is the sum of cost price and profit per tin.
Explanation:
Cost price of one tin = ₦
x
x
x
.
Profit on one tin = ₦
y
y
y
.
Selling price of one tin = ₦
x
x
x
+ ₦
y
y
y
= ₦
(
x
+
y
)
(x + y)
(
x
+
y
)
.
For 10 tins, total amount received =
10
×
(
x
+
y
)
10 \times (x + y)
10
×
(
x
+
y
)
= ₦
10
(
x
+
y
)
10(x + y)
10
(
x
+
y
)
.
Answer:
D. ₦
10
(
x
+
y
)
10(x + y)
10
(
x
+
y
)
© africaexams.com
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