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CSAT 2021 | DDSQ Feb 10 | Civil Services | IAS | UPSC | State PSC | SSC | IBPS | NDA | CDS | Railways

The average age of a teacher and three students is $20$ years. If all the three students are of same age and the difference between the age of the teacher and each student is $20$ years, then what is the age of the teacher? (2020)

$(a)$ $25$ years
$(b)$ $30$ years
$(c)$ $35$ years
$(d)$ $45$ years

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CSAT 2021 | DDSQ Feb 10 | Civil Services | IAS | UPSC | State PSC | SSC | IBPS | NDA | CDS | Railways