The Student Room Group

OCR S1

Am I allowed to use the sigma notation in my working out, rather than having to do the full calculation for S1 OCR?
Reply 1
Original post by KingF
Am I allowed to use the sigma notation in my working out, rather than having to do the full calculation for S1 OCR?


Either should be fine really, I can't see the examiners discriminate for simple addition. Although do make it as clear as possible.
Reply 2
Ah ok thanks. Because using sigma make it so much fast when doing probability questions.

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