Jason won some goldfish at the state fair. During the first week 1/5 of them died and during the second week, 3/8 of those still alive at the end of the first week died. What fraction of the original goldfish were still alive after two weeks?

A 3/10

B 17/40

C 1/2

D 23/40

Solution

Correct Answer: Option C

ধরি, Jason 40টি goldfish কিনেছিল। 
প্রথম সপ্তাহে মারা যায়= (40*1/5) =8টি 
প্রথম সপ্তাহ পর জীবিত থাকে= (40-8) =32টি 

দ্বিতীয় সপ্তাহে মারা যায়= (32*3/8)টি =12টি
জীবিত থাকে= (40-8-12) টি =20টি
∴জীবিত থাকে =20/40= 1/2

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