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# The cost of 2 biros and 3 pencils is ₦18, if a pencil cost ₦2.50k, how much ...

### Question

The cost of 2 biros and 3 pencils is ₦18, if a pencil cost ₦2.50k, how much is a biro?

### Options

A) ₦4.25k

B) ₦3.20k

C) ₦4.00

D) ₦5.25k

The correct answer is D.

### Explanation:

If 2 biros and 3 pencil is #18
Note a pencil is #2.5
Therefore 3 pencil will be
3 × 2.5 = 7.5
Subtract the total amount of pencil from 18
18 - 7.5 = 10.5 as the amount for the 2 biros
Now how much is a biro
Remember
2biro = #10.5
1biro = #x
Cross multiply
x# = #5.25. That's it

Explanation provided by Timothy Godspower

## Discussion (2)

• If 2 biros and 3 pencil is #18
Note a pencil is #2.5
Therefore 3 pencil will be
3 × 2.5 = 7.5
Subtract the total amount of pencil from 18
18 - 7.5 = 10.5 as the amount for the 2 biros
Now how much is a biro
Remember
2biro = #10.5
1biro = #x
Cross multiply
x# = #5.25. That's it

1. Well done