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Suppose 2 kg of sugar contains 9 xx 10^6...

Suppose 2 kg of sugar contains `9 xx 10^6` crystals. How many sugar crystals are there in : 5 kg of sugar?

A

`2 xx 10^6`

B

`5 xx 10^6`

C

`5 xx 10^5`

D

`5.4 xx 10^6`.

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