The average of five consecutive numbers is n. If the next two numbers are also included, the average will : Options: A . &nbspremain the same B . &nbspincrease by 1 C . &nbspincrease by 1.4 D . &nbspincrease by 2.

The average of five co

Question

The average of five consecutive numbers is n. If the next two numbers are also included, the average will :

Options:

A . remain the same

B . increase by 1

C . increase by 1.4

D . increase by 2.

Answer: Option B

Left five consecutive numbers be ` x, x + 1, x + 2, x + 3 and x + 4`.

Their average = `(5x + 10)/(5)` = `(x + 2)`

Average of 7 number = `((5x + 10) + (x + 5) + (x + 6))/(7)` = `(7x + 21)/(7)` = `(x + 3)`

so the average increased by 1.

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