Helene bought 6 bottles of juice. the bottles were on sale at 10 bottles for $12. which explanation correctly tells how to calculate the cost of 6 bottles? a. step 1 multiply $12 by 10 to figure out the cost of 1 bottle. step 2 divide that cost by 6. b. step 1 divide $12 by 10 to find out the cost of 1 bottle. step 2 multiply that cost by 6. c. step 1 multiply $12 by 10 to find out the cost of 1 bottle. step 2 multiply that cost by 6. d. step 1 divide $12 by 10 to find out the cost of 1 bottle. step 2 divide that cost by 6.

she wanted to buy 6 bottles.
the cost of 10 bottles was $12.
therefore we need to find the cost of one bottle and then find the cost for 6 bottles.                                           
if 10 bottles cost - $ 12                                                                                  
then 1 bottle costs - $ 12 / 10 bottles
                                         
here we divided 12 by 10 , cost of 1 bottle is 12/10 to find the cost of 6 bottles we have to multiply by 6 .12 / 10 x 6
                                                                                 
correct answer is therefore B. divide 12 by 10 and then mulitply by 6

Option: B is the correct answer.

B.   Step 1:  Divide $12 by 10 to find out the cost of 1 bottle.

Step 2 :  Multiply that cost by 6.

Step-by-step explanation:

The cost of 10 bottles is: $ 12.

This means that the cost of 1 bottle is:

$ (12/10)=$ 1.2

( Since the cost of  1 bottle will be less and hence the total cost must be divided by the number of items in order to obtain the cost of 1 item)

and similarly in order to find the cost of 6 items we need to multiply the cost of 1 item by 6.

Hence, cost of 6 bottles of juice is: $ (1.2×6)=$ 7.2

Hence, the correct answer is:

B.   Step 1:   Divide $12 by 10 to find out the cost of 1 bottle.

Step 2:   Multiply that cost by 6.