Correct answers only !
a jeweler in campbell examined which metals her customers selected for wedding bands last year.
what percent of the rings sold had a platinum or silver band?
write your answer using a percent sign (%).

Hello!

To calculate percent, it is number of positive cases / number of total cases. So first, we want to find the number of positive cases. You're looking for platinum and silver bands, so just add together the number of platinum and silver bands sold.

Platinum bands: 900

Silver bands: 900

Number of positive cases: 900 + 900 = 1,800

Now, look for the number of total cases. Here, just add together all the band types to get the number of rings bought in total.

Platinum: 900

Silver: 900

Gold: 700

Total number of cases: 900 + 900 + 700 = 2,500

Now, use the equation, and divide the two.

1,800 / 2,500 = .72 = 72%

Therefore, your answer is 72% of the rings sold had a platinum or silver band.

Hope this helps!

72%

Step-by-step explanation:

all work is shown amd pictured

step-by-step explanation:

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step-by-step explanation: