Nicole is planning to donate $4$ dozens of non perishable foods to charity. Among $10$ non perishable foods she already has, $30\%$ of them are canned foods and the rest of them are dried foods. she wanted to havehalf of canned foods and half of dried foods out of total $4$ dozens. How many canned foods does she have to buy? A. $21$A. $21$ B. $38$ C. $17$ D. $45$ E. $3$

Show AnswerShow The First Step1. First, we need to know how many canned food she already has. Since there are $30\%$ of $10$ canned foods, we can get the number of canned foods by calculating $\displaystyle \frac{30}{100} \times 10 = 3$.Show Next Step2. Remember $4$ dozen is $48$. Since she wants to have a half of canned foods out of $48$, the number of canned foods to donate to charity is $24$. She already has $3$ number of canned foods. So, she needs to buy ${24} - {3} = 21 $ number of canned foods. No More Steps