Respuesta :
Answer:
£2.10
Step-by-step explanation:
1.80 divided by .12 = .15
.15 times 7 = 1.05
1.05 divided by 3 = .35
.35 times 5 = 2.10
The cost of 5 pens will be £1.75
Since 12 pencils cost £1.80, the price of a pencil will be gotten by dividing £1.80 by 12. This will be:
= £1.80 / 12
= £0.15
A pencil costs £0.15
Since the ratio of the cost of a pen to the cost of a pencil is 7: 3, therefore, the cost of a pen will be:
= 7/3 × £0.15
= £0.35.
The cost of a pen is £0.35, therefore, the cost of 5 pens will be:
= £0.35 × 5
= £1.75
In conclusion, the cost of 5 pen is £1.75.
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