Based on the calculation below, the number of packs of green pens is 7, while the number of packs of red pens is 12.60.
How do we use the ratio to solve a problem?
Let g and r represent the number of green and red pens respectively.
Therefore, we have the following ratio:
g = 1:3 = r
Since one green pen costs sh2000 and one red pen costs sh1000; the ratio 1:3 above implies that for every sh2000 spent on green, sh3000 (i.e. 3 * sh1000) is spent on red pen.
To ensure that the pens get finished at the same time, the total budget of sh1,050,00 is shared between the two pens as follows:
Amount to spend on green pen = (2000 / (2000 + 3000)) * sh1,050,00 = sh420,000
Amount to spend on red pen = (3000 / (2000 + 3000)) * sh1,050,00 = sh630,000
Therefore, we have:
Number of green pen = Amount to spend on green pen / Price per green pen = sh420,000 / sh2000 = 210
Number of red pen = Amount to spend on red pen / Price per red pen = sh630,000 / sh1000 = 630
Finally, we have:
Number of packs of green pen = 210 / 30 = 7
Number of packs of red pen = 630 / 50 = 12.60
Learn more about ratios here: https://brainly.com/question/13419413.
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