Question

The average of 4 number is 30. If the sum of 3 number is 85, the fourth number is

Answer 1

Answer:

So the answer will be 35.

Answer 2

Answer:

Let the numbers be a, b, c, d.

As given,

( a + b + c + d ) / 4 = 30

a + b + c + d = 120 ----- ( 1 )

Also,

a + b + c = 85 ----- ( 2 )

From ( 1 ) nd ( 2 ),

( a + b + c + d ) - ( a + b + c ) = 120 - 85

d = 35

Therefore, the fourth number is 35.

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