Question

The mean of 5 observations is 19. Find the fifth observation, if the four observation are 16,18,15 and 12. In simple mean it's urgent​

Answer 1

Answer:

Mean. Set: 8, 12, 9, 7, 13, 10 Mean = (8 + 12 + 9 + 7 + 13 + 10) / 6 = 59 / 6 = 9.83

Step-by-step explanation:

Mean =sum of observation ÷no. Of observation According to first statement Sum=280 As instead of 14,24 was misread,so we have to subtract 24 from 280 280-24=256 Then,we add correct observation i.e 14 in 256 256+14=270

Answer 2

Step-by-step explanation:

Let the addition of first 5 observation be a and next 5 be b.

∴a=50

And mean =20

∴10a+b=20

a+b=200

b=200−9

b=200−50

b=150 

∴ mean of remaining 5 observations is given by 5b=5150=30.