High School

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1. A supermarket found that 50 out of every 100 customers shopped in the morning, and the rest shopped in the afternoon. If 275 people shopped in the afternoon, how many customers were there in total?

2. For every 2 pairs of jeans you buy for a total of R1647, you save R246. How much did you save per pair of jeans?

3. If you buy 3 identical items with a total of R69, how much would each item be?

4. If you scored 57 out of 97 marks, what is your percentage score?

5. The cost of one unit is R12. How much will 43 units cost?

6. If you work 8 hours a day for 20 days, how many hours do you work in total?

Answer :

  1. Let's find the total number of customers in the supermarket. We know that 50 out of every 100 customers shop in the morning, which means the other 50 out of 100 shop in the afternoon.

    If 275 people shopped in the afternoon, that is 50% of the total. Therefore, the total number of customers can be calculated as follows:

    [tex]\text{Total Customers} = \frac{275}{0.50} = 550[/tex]

    So, there were 550 customers in total.

  2. You know that for every 2 pairs of jeans, you save R246. To find out how much you save per pair of jeans, you can divide the total savings by 2:

    [tex]\text{Savings per pair} = \frac{R246}{2} = R123[/tex]

    Therefore, you save R123 per pair of jeans.

  3. If you buy 3 identical items for a total of R69, the cost of each item can be found by dividing the total cost by the number of items:

    [tex]\text{Cost per item} = \frac{R69}{3} = R23[/tex]

    Therefore, each item costs R23.

  4. To find your percentage score when you scored 57 out of 97 marks, use the formula for percentage:

    [tex]\text{Percentage Score} = \left( \frac{57}{97} \right) \times 100 \approx 58.76\%[/tex]

    Therefore, your percentage score is approximately 58.76%.

  5. To calculate the total cost for 43 units, if one unit costs R12, multiply the price per unit by the number of units:

    [tex]\text{Total Cost} = 43 \times R12 = R516[/tex]

    Therefore, the cost of 43 units is R516.

  6. If you work 8 hours a day for 20 days, the total number of hours you work is:

    [tex]\text{Total Hours} = 8 \times 20 = 160[/tex]

    Therefore, you work 160 hours in total.

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Rewritten by : Barada