the average number of masks given by 50 students is 30. when the class teachers brings the masks, the average number increases by 1. so what is the number of mask Brought by the class teacher?
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कवितेत व्यक्त झालेल्या कष्टकऱ्यांच्या जीवनाविषयी तुमच्या भावना लिहा.
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