Ella filled a bucket 7/10 of the way with water. she then poured out 2/10 of the water. how much water remains in the bucket?

 The water that remains in the bucket is

Explanation:

Let the total quantity of water that can be filled in the bucket be x litres

then, volume of water when ella filled it up =

amount of water taken out post that =

amount of water left in the bucket = amount of water when ella filled it up  - amount of water taken out post that =

Thus water remains in the bucket is

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the answer is definitely a