Question

1,3,5,7,9,11...25 संख्याओं का औसत कितना होगा​

Answer 1

Answer:

hi mate..

Step-by-step explanation:

take out the sum of the no...

there is a formula for taking out...

Sn =  n/2  [ a + l ]     [  Sn is the sum and n is the no . o terms a is the first term and l is the last term.. ]

now here,  we use the concept of arithematic progressions

l =  a + [n-1]d    [  d is the common difference ]

25 = 1 + [n-1]2

n-1= 12,

n =13

now,

Sn =  n/2  [ a + l ]

S13 =  13/2 [ 1 + 25]

S13 = 169

mean= 169/13= 13

hope you get it

Answer 2

Total numbers = 25

= n + 1 / 2

= 25 + 1 / 2

= 26 / 2

= 13

Hope it help you.....

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