Mccarthy Herrera
05/24/2023 · Senior High School
There were some key chains, pens and erasers in a lucky draw box. For every 3 key chains, there were 5 pens. For every 4 pens, there were 3 erasers. (a) Find the ratio of the number of key chains to the number of pens to the number of erasers. (b) When 18 key chains were added into the lucky draw box, \( 70 \% \) of the items were pens and erasers. How many pens were there in the box?
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(a) The ratio of key chains to pens to erasers is 4:5:3.
(b) There are 120 pens in the box.
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