Question

The average of fifteen numbers is 15.If the average of first five numbers is 14 and that of other 9 numbers is 16.Find the middle number.

Answer 1

Answer:

11

Step-by-step explanation:

sum of fifteen nos/15=15

so, sum of fifteen nos=225

sum of first five no/5=14

so, sum of first five no=70

sum of last nine nos/9=16

so, sum of last nine nos=144

middle no=sum of fifteen nos-(sum of first five no+sum of last nine nos)

=225-(144+70)

=225-214=11