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Chapter 6- Exchange Rate concept
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The different concepts are explained here

Arpita Prakash
YouTuber NCERTs series initiator at Unacademy 'Educator of the Month' for Feb'19 CBSE 0.1% Merit Certificate holder in Mathematics

Comments
(4)
Unacademy user
Ma'am, lesson 22 and lesson 16 are almost same. The slides are identical.
Ma'am, lesson 22 and lesson 16 are almost same. The slides are identical.
Arpita Prakash
a month ago
It might have got republished because of tech error ,,
thank you so much mam