A hair colouring product requires henna and indigo in the ratio a:b. Which of these ratios is the same as a:b?
A) a+1: b+1
B) a-1: b-1
C) a+a: b+b
D) a+b: b+a
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Answer:
A) a+1: b+1
Step-by-step explanation:
a+1 : b+1
a:b ... .
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