Leslie is a biologist. She is going to randomly select one animal from her lab to study. There are 5 salamanders, 3 crayfish, an
2 answers:
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Answer:
20 mangoes.
Step-by-step explanation:
Given:
Total number of mangoes, a trader bought =
A trader bought at the rate of 4 mangoes for 10 naira.
Five of the mangoes were bad.
He sold the remaining at the rate of 5 mangoes for 20 naira.
He made a gain of 10 naira
Question asked:
Total number of mangoes, a trader bought = = ?
Solution:
Unitary method
Cost price of 4 mangoes = 10 naira.
Cost price of 1 mango =
Cost price of mango =
As 5 of the mangoes were bad and he sold the remaining mangoes, then Total number of mangoes sold =
Sale price of 5 mangoes = 20 naira
Sale price of 1 mango =
Sale price of mango =
Now, as we know,
Adding both sides by 20
Multiplying both sides by 2
Dividing both sides by 3
Therefore, total number of mangoes, a trader bought is 20.