Arithmetic Aptitudes › Average › Question #5531
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QThe average of marks of 13 papers is 40.The average of the first 7 papers is 42 and that of the last 7 papers is 35 .What are the marks of the seventh paper?

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  • A 19.5 ✔ ✖
  • B 19 ✔ ✖
  • C 18.5 ✔ ✖
  • D 18 ✔ ✖
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Solution

Marks in the seventh paper=(42×7×+35×7-40×13)

(294+245-520)=539-520=19

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