SSC cgl mains 2022 math asked questions

Q.1 The average marks obtained by Saloni in four papers is 51, and in the fifth paper she

gets 56 marks. Find her new average in all five papers.

सलोनी द्वारा चार पेपरों में प्राप्त औसत अंक 51 हैऔर पांचवें पेपर में उसे 56 अंक प्राप्त हुए हैं। सभी पाँच पेपरों में उसका नया औसत ज्ञात की जिए।

Ans

         1. 51                 2. 50                  3. 49                 4. 52

Sol . (d)

Method (1)

                         Average in 4 subject = 51

Total marks in 4 subject = 51 * 4 = 204

                        After 5th subject, Total marks of saloni in 5 subjects = 204 + 56 = 260

                        New average (5 subject) = 260/5 = 52

            Method (2)

                        Total deviation = 56 – 51 = +5

                        Average increased in 5 subject = +5/5 = 1

                        New average = 51 + 1 = 52

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