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81
Let x be the first number, y be the 2nd number and z be the third number
x + y + z = 246
One of this number is 84, so lets assume that x is 84
84 + y + z = 246
Subtract 84 to both sides
y + z = 162
Since the problem asks for the average, we dont need to get the two numbers.
Since the sum is given, we just need to divide it to the no. of numbers.
Since there are 2 numbers, 162/2 = 81 is the average.
Therefore the average of the two numbers is 81.
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