1.

1). 162). 183). 194). 17

Answer»

AVERAGE of numbers = Sum of numbers/ Total numbers

Average of first 12 numbers is 15

Sum of FOUR numbers = 15 × 12 = 180

New number 41 is to be added

Average of 13 numbers = (Sum of 12 numbers + 13th number)/13

Average = (180 + 41)/13 = 221/13 = 17



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