Discussion

Explanation:

Assuming that the box contains x number of chocolates.

​​​​​​​​​​​​​​​​​​​​​

Remaining = 0.36x

After giving chocolates to friends, she gives 20 chocolates to guests also.

∴ Remaining chocolates with her = 0.36x – 20 = 0.35x

⇒ 0.01x = 20

⇒ x = 2000

∴ She had 2000 chocolates at the start.

She ate 0.2x + 0.12x = 0.32x = 640 chocolates

Hence, option (c).

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