1.

Find the arithmetic mean between:(i) 9 and 19(ii) 15 and -7(iii) -16 and -8

Answer»

(i) 9 and 19

To find: Arithmetic mean between 9 and 19

The formula used: Arithmetic mean between a and b = +/2

We have 9 and 19

A.M. = 9+19/2

= 28/2

= 14

(ii) 15 and -7

To find: Arithmetic mean between 15 and -7

The formula used: Arithmetic mean between a and b = +/2

We have 15 and -7

A.M. = (-15)+(-7)/2

= 15-7/2

= 8/2

= 4

(iii) -16 and -8

To find: Arithmetic mean between -16 and -8

The formula used: Arithmetic mean between = a and b = +/2

We have -16 and -8

A.M. = (-16)+(-8)/2

= -16-8/2

= -24/2

= -12



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