Arelli had 20 minutes to do a three-problem quiz. She spent 9 7/10 minutes on question A and 3 2/5 minutes on question B. How much time did she have left for question C?
Solve on paper to find the answer as a fraction.

Correct answer:

c =  6 910 = 69/10 min

Step-by-step explanation:

t=20 min a=9107=9+107=109 10+7=1090+7=1097=9.7 min b=352=3+52=53 5+2=515+2=517=3.4 min  c=tab=201097517=1069 min=6109 min=6.9 min

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