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Andaikan masa yang diambil (dalam minit) oleh pelajar untuk menjawab soalan peperiksaan EPPD2023 adalah bertaburan normal dengan min 120 minit dan sisihan piawai 30 minit.

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Andaikan masa yang diambil (dalam minit) oleh pelajar untuk menjawab soalan peperiksaan EPPD2023 adalah bertaburan normal dengan min 120 minit dan sisihan piawai 30 minit. Jika 90% daripada calon dapat menjawab soalan dalam masa kurang daripada X minit, kirakan nilai X? *Berikan jawapan numerik sahaja tanpa unit * Berikan jawapan yang tidak dibundarkan

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