Question 8

The cost of 2 dozen pens is $10.80.

To determine the cost of 2 dozen pens, we first calculate the cost of one pen based on the given price of 6 pens for $3.60. One dozen is 12 pens, so 2 dozen equals 24 pens, which will cost $10.80.

A) $7.20

This option suggests that the cost of 2 dozen pens is $7.20, which is incorrect. The calculation shows that the cost per pen is $0.60, leading to a total of $14.40 for 2 dozen pens, not $7.20.

B) $8.70

Choosing $8.70 as the cost for 2 dozen pens is also incorrect. The cost of 2 dozen pens, calculated accurately, comes to $10.80, which is significantly higher than $8.70.

C) $10.80

This option is correct. By calculating the cost of one pen as $0.60 from the total cost of 6 pens, we find that 2 dozen pens (24 pens) cost $10.80, confirming this option as the right answer.

D) $11.60

The option of $11.60 is not correct. The correct calculation shows that 2 dozen pens cost $10.80, which is lower than $11.60.

E) $13.92

This option is incorrect as well. The calculations do not support a cost of $13.92 for 2 dozen pens, as determined by the accurate cost of $10.80.

F) none of these

This choice is not applicable since the correct answer has been identified as $10.80.

Conclusion

The accurate calculation confirms that the total cost for 2 dozen pens is indeed $10.80, making option C the correct answer. All other options either underestimate or overestimate the cost based on the price per pen derived from the initial information. Therefore, option C stands out as the only valid solution.