Question

| The average of 5 consecutive numbers
is 18. If next 2 numbers are also included,
then what will be the new average?​

Answer 1

Answer:

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Answer 2

Answer:

19

Step-by-step explanation:

let , the five consecutive number be, x, x+1, x+2, x+3, x+4

given, average of 5 consecutive numbers is 18

hence, sum of 5 consecutive numbers = 5×18= 90

$x + (x + 1) + (x + 2) + (x + 3) + (x + 4) = 90 \\ 5x + 10 = 90 \\ 5x = 80 \\ x = 16$

five number are 16,17,18,19,20

next two numbers are 21, 22

sum of 7 numbers is

$16 + 17 + 18 + 19 + 20 + 21 + 22 \\ = 133 \\ \\ new \: average \: will \: be = 133 \div 7 = 19$