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CBSE Class 9 Answered

Which among the following phrases has been used correctly? Though she had asked for an exact number, the employee gave her a back-of-the-envelope calculation which infuriated her. The teacher asked for a back-of-the-envelope calculation so the obedient students gave her the exact number.
Asked by Topperlearning User | 15 May, 2015, 01:15: PM
answered-by-expert Expert Answer

‘Back-of-the-envelope calculation’ refers to an approximate number, not an exact number. So, the usage in b is wrong.

Answered by | 15 May, 2015, 03:15: PM
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