The average of a set of 20 numbers is P. If one of the numbers from the set is replaced with 58, then the average becomes (P - 2). What is the value of the number that is replaced?
Answer & explanation
Correct answer: option 1
According to question ,
Sum of 20 numbers = 20P
New sum of 20 numbers = 20( P - 2 ) = 20P - 40
Sum decreased by 40 . So , Replaced number is 58 + 40 = 98