Question

answer with easy explanation​

Answer 1

Answer:

Mean of first 10 multiples of 2 is 11.

Step-by-step explanation:

We know,

Mean = Sum of observations / no. of observations

Here,

Observations are : first 10 multiples of 2

= > 2 , 4 , 6 , 8 , 10 , 12 , 14 , 16 , 18 , 20.

No. of observations = 10

= > Sum of observations = 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20

= > 2( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 )

= > 2( 11 + 11 + 11 + 11 + 11 )

= > 2( 55 )

= > 110

Therefore,

= > Required mean = ( sum of first 10 multiples of 2 ) / 10

= > Required mean = 110 / 10

= > Required mean = 11

Hence the required mean is 11.

Answer 2

2+4+6+8+10+12+14+16+18+20/10

step-by-step:- 2+4+6+8+10+12+14+16+18+20=110

Then,110/10=11 ANS