The average of 28 numbers is 77 The averageoffirst 14 numbers is 74 and the average of last 15 numbe...........

Quantitative Aptitude (CGL) Average

The average of 28 numbers is 77. The averageoffirst 14 numbers is 74 and the average of last 15 numbers is 84. If the 14th

number is excluded, then whatis the average of remaining numbers? (correct to one decimal places)

This questions was previously asked in

SSC CGL 13th August 2021 Shift-1

76.9

73.1

74.7

- The average of 28 numbers is 77. Multiply to find the total: 28 x 77 = 2156.

- The average of the first 14 numbers is 74. Total is 14 x 74 = 1036.

- The average of the last 15 numbers is 84. Total is 15 x 84 = 1260.

- Sum of the 29 numbers would be the total of 28 numbers minus 14th number: 2156 - 14th number.

- We calculate the 14th number: 1036 + 1260 - 2156 = 140.

- Exclude the 14th number. Total becomes: 2156 - 140 = 2016.

- Remaining numbers: 28 - 1 = 27.

- New average: 2016 / 27 ˜ 74.7.

Answer is Option 4: 74.7

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