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https://i.stack.imgur.com/ApUsk.jpg

14) Answer is B.

this was my thought process: It says 30% of the "1-3 Days group" which to me means we want to take 30% of 77. 30% of 77 = 23.1, this number is the total number that should be then redistributed into the 4-6 days group. It will be distributed to all the different colors proportionally. But as far as how many of the 23.1 goes into Cyan is the part I am stuck on.

I tried thinking that of the 4-6 days group 21/52 are Cyan which is about 40%. So I then took 40% of 23.1 = 9.24. Added this 9.24 + 21 = 30.

Thank you.

Arcuvia
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1 Answers1

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Work directly with cyan algae that lasts from $1-3$ days. $$16 \times 0.3 + 21$$

Comment about your approach:

The statement "these blossoms are distributed proportionally to the colors" refers to algae that lasts from $1-3$ days.

You can also do $$23.1 \times \frac{16}{77}+21=77 \times 0.3 \times \frac{16}{77}+21$$

Siong Thye Goh
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