1) The mean of 16 numbers is 8. If 2 is added to every number, what will be the new mean?
2) If the mean of five observations x, x+2, x+4, x+6, x+8 is 11, Find the mean of first three observations.
please answer the question fast and with explanation
Answers
Step-by-step explanation:
1)Solution :-
mean of 16 nos. is. 8
sum of 16 nos. is 16×8=128
2 is added to every no.
so sum =144+2(8)
=144+16
=160
mean =160/16
=10
2)Solution :-
Given observations x,x+2,x+4,x+6,x+8
Given observations x,x+2,x+4,x+6,x+8∵
Given observations x,x+2,x+4,x+6,x+8∵ 5
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8)
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8)
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 5
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20 =11
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20 =11⇒x=7
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20 =11⇒x=7So, the observations are 7,9,11,13,15
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20 =11⇒x=7So, the observations are 7,9,11,13,15Req. mean =
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20 =11⇒x=7So, the observations are 7,9,11,13,15Req. mean = 3
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20 =11⇒x=7So, the observations are 7,9,11,13,15Req. mean = 311+13+15
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20 =11⇒x=7So, the observations are 7,9,11,13,15Req. mean = 311+13+15
Given observations x,x+2,x+4,x+6,x+8∵ 5x+(x+2)+(x+4)+(x+6)+(x+8) =11⇒ 55x+20 =11⇒x=7So, the observations are 7,9,11,13,15Req. mean = 311+13+15 =13