Answer:
516
Step-by-step explanation:
First
34% small and 40% large means that 100 - (34 + 40) = 26% medium
26% of 600 = 0.26 × 600 = 156
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Second
[tex]\frac{3}{10}[/tex] are small and [tex]\frac{1}{10}[/tex] are large, which means [tex]\frac{6}{10}[/tex] are medium
[tex]\frac{6}{10}[/tex] × 400 = 0.6 × 400 = 240
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Third
sum the parts of the ratio, 3 + 4 = 7
Divide 210 by 7 to find the value of one part of the ratio
210 ÷ 7 = 30 ← value of 1 part of ratio
Thus medium = 4 × 30 = 120
Total number of medium packets = 156 + 240 + 120 = 516
